Table of Contents
Overview
Definition and Principles
Spintronics, a portmanteau of "spin transport electronics," is a branch of electronics that focuses on the intrinsic spin of electrons and their associated magnetic moments, in addition to their fundamental electronic charge, within solid-state devices.[3.1] This field aims to exploit the "neglected" magnetic degree of freedom of electrons for both classical and quantum information processing.[17.1] Unlike traditional electronics, which primarily relies on the charge of electrons, spintronics utilizes both the charge and spin properties of electrons, allowing for enhanced functionalities in data storage and processing.[23.1] The origins of spintronics can be traced back to the pioneering ferromagnet/superconductor tunneling experiments conducted by Meservey and Tedrow, as well as initial experiments on magnetic tunnel junctions by Julliere in the 1970s.[19.1] The theoretical foundation for using semiconductors in spintronics was laid with the proposal of a spin field-effect transistor by Datta and Das in 1990, alongside the concept of electric dipole spin resonance introduced by Rashba in 1960.[19.1] Spintronics is a rapidly evolving field that investigates the spin of electrons and their magnetic moments in solid-state devices.[4.1] Unlike traditional electronics, which relies on controlling the flow of electrons or other electrically charged particles to convey binary data, spintronics employs the spin state of electrons alongside their charge for information storage and transfer.[22.1] This fundamental difference allows both traditional electronics and spintronics to represent binary data as zeros and ones; however, spintronics achieves this through two distinct spin states.[22.1] The manipulation and control of electron spin in spintronics lead to greater read and write speeds, enhancing the performance of devices.[21.1] Furthermore, spintronics holds significant promise for various applications, including mass storage, medical technologies, and digital electronics, suggesting its transformative potential in the future of electronics.[4.1]Applications in Information Technology
Spintronics has emerged as a transformative technology with significant applications in information technology, particularly in memory storage and logic devices. A notable advancement in this field is the development of Magnetoresistive Random Access Memory (MRAM), which utilizes the magnetic state of magnetic tunnel junctions (MTJs) to store data. Unlike traditional volatile memory technologies, MRAM offers non-volatility, allowing data retention without a constant power supply, thus enhancing energy efficiency and performance in electronic devices.[29.1] The integration of spintronics into existing semiconductor technologies presents a significant opportunity for enhancing the performance and efficiency of electronic devices. This technology is particularly advantageous due to its compatibility with current semiconductor manufacturing processes, allowing for seamless integration without major overhauls of tools and materials.[9.1] As researchers approach the physical limits of miniaturization and performance enhancements in conventional semiconductor technology, spintronics offers a transformative approach by utilizing the intrinsic spin of electrons alongside their charge.[10.1] Moreover, spintronics addresses the challenge of increased power dissipation in electronic circuits, offering solutions with zero standby leakage and low power consumption, essential for advancing modern electronic applications.[8.1] Beyond MRAM, spintronics is paving the way for multifunctional devices that combine storage, detection, logical, and communication functions on a single chip. This capability could potentially replace multiple components in electronic systems, leading to more compact and efficient designs.[28.1] Additionally, advancements in antiferromagnetic spintronics are expected to revolutionize data storage by enabling ultra-fast, low-power, and high-density memory devices, capable of operating at terahertz frequencies.[27.1] The exploration of two-dimensional (2D) materials has also shown promise in enhancing spintronic device performance. These materials possess unique properties, such as high spin polarization and robust room-temperature performance, which are essential for improving spin injection efficiency in future spintronic applications.[14.1] As research progresses, spintronics is poised to play a crucial role in the evolution of information technology, offering innovative solutions that address the limitations of conventional semiconductor technologies.[11.1]History
Key Discoveries and Milestones
The field of spintronics has evolved significantly since its inception, marked by several key discoveries and milestones that have shaped its development. The origins of spintronics can be traced back to the 1960s when researchers at IBM, led by physicist Leo Esaki, first identified spin transfer electronic effects and their potential applications in solid-state devices.[42.1] This foundational work laid the groundwork for understanding the intrinsic spin state of electrons and their associated magnetic moments, which are central to spintronic technology.[43.1] In the early 20th century, pivotal experiments contributed to the understanding of electron spin, which is crucial for the emergence of spintronics as a distinct field. The Stern-Gerlach experiment conducted in 1922 provided the first direct evidence of electron spin, although its correct interpretation was not fully realized until 1927.[86.1] Wolfgang Pauli's formulation of the spin-statistics theorem in 1940 further established the theoretical framework for understanding spin, classifying particles based on their spin characteristics.[84.1] Additionally, Paul A.M. Dirac's relativistic wave equation for the electron, proposed in 1928, played a significant role in advancing the theoretical underpinnings of electron behavior.[85.1] The 1970s marked another critical phase in the development of spintronics with the pioneering work on magnetic tunnel junctions by Julliere, which demonstrated the feasibility of utilizing electron spin in practical applications.[43.1] This was complemented by the ferromagnet/superconductor tunneling experiments conducted by Meservey and Tedrow, which further explored the coupling between spin and charge in electronic devices.[43.1] The theoretical proposal of a spin field-effect transistor by Datta and Das in 1990 represented a significant milestone, suggesting that semiconductors could be effectively used in spintronic applications.[43.1] As research progressed, the field began to integrate with complementary metal-oxide-semiconductor (CMOS) technology, leading to the development of magnetic tunnel junctions (MTJs) that are now essential components in modern spintronic devices.[67.1] Today, spintronics continues to advance, with ongoing research at various institutions and companies exploring new materials and heterostructures that promise to enhance the performance and applicability of spintronic devices.[45.1] The field not only holds potential for technological innovations but also contributes to a deeper understanding of fundamental physical processes related to magnetism and electron behavior.Evolution of Spintronics Technology
The discovery of giant magnetoresistance (GMR) in the late 1980s marked a pivotal moment in the evolution of spintronics technology. This quantum mechanical effect, observed in thin film structures composed of alternating ferromagnetic and nonmagnetic layers, results in a significant decrease in electrical resistance in the presence of a magnetic field, typically ranging from 10% to 80%.[59.1] The implications of GMR were profound, as it enabled the development of read heads for computer hard drives, significantly increasing their storage capacity to gigabytes during the 1990s.[62.1] By the year 2000, all computer hard-disk drives manufactured worldwide were utilizing GMR thin films as read heads, underscoring the technology's rapid adoption and impact on data storage.[58.1] The advantages of GMR extend beyond mere storage capacity; it also facilitates faster readout speeds and increased storage density, which are critical for modern information technology.[61.1] The hard-disk drive industry, valued at approximately US$46 billion in 1996, experienced substantial growth due to the capabilities provided by GMR, allowing bit densities to increase by 60% annually.[57.1] This advancement not only revolutionized hard-disk technology but also laid the groundwork for the broader field of spintronics, which leverages both the charge and spin of electrons for enhanced device functionalities.[46.1] As spintronics technology evolved, it faced challenges in integrating with existing semiconductor technologies. The convergence of semiconductor heterostructures with magnetic materials has led to the emergence of "semiconductor spintronics," a field that aims to manipulate spin while maintaining compatibility with traditional semiconductor devices.[50.1] However, significant challenges remain, including the need to ensure device functionalities and synergy with molecular properties in applications such as organic field-effect transistors.[48.1] Despite these hurdles, the potential benefits of spintronics—such as non-volatility, lower power consumption, and faster switching speeds—continue to drive research and development in this promising area.[52.1]In this section:
Recent Advancements
Two-Dimensional Spintronics
Recent advancements in spintronics have underscored the significant potential of two-dimensional (2D) materials in both fundamental research and technological development, primarily due to their unique chemical and physical properties that are typically absent in their bulk counterparts.[107.1] Among these materials, two-dimensional conductive metal-organic frameworks (2D c-MOFs) have emerged as a notable class, characterized by their pre-designable and tunable structures.[107.1] These attributes position 2D c-MOFs as promising candidates for various applications in spintronics, although specific advantages for enhancing spin transport and manipulation were not detailed in the available information.[107.1] Recent advancements have highlighted the potential of 2D MOFs in various spintronics applications, including spin transport and spin manipulation. These materials exhibit bipolar magnetic semiconductor characteristics, which can be leveraged to improve the efficiency and functionality of spintronic devices.[94.1] Furthermore, the integration of 2D spintronic materials into neuromorphic computing systems has been explored, indicating a promising direction for future research and development in this field.[95.1] The advantages of utilizing 2D materials in spintronics extend beyond their structural properties. Spintronic devices based on these materials can achieve higher speeds and reduced power consumption compared to traditional electronic devices. This is primarily due to the ability of spin states to switch faster than charge states, enabling quicker data processing while consuming less energy.[100.1] Additionally, the non-volatility of certain spintronic memory devices allows them to retain information without continuous power supply, further enhancing their applicability in modern electronic systems.[101.1]Neuromorphic Spintronics
Recent advancements in neuromorphic spintronics highlight the potential of spintronic devices to enhance the efficiency and performance of neuromorphic computing systems compared to traditional computing methods. One significant advantage of spintronics is its multifunctionality, which allows designers to create a variety of behaviors—ranging from non-volatile to plastic, oscillatory, and stochastic—using similar materials. This versatility can lead to lower energy consumption by harnessing thermal processes, making spintronic devices particularly attractive for neuromorphic applications.[104.1] Recent reviews have summarized the progress in integrating spintronic technologies into neuromorphic computing, emphasizing the transformative benefits of these devices. The scalability and real-time capabilities of spintronic devices enable localized processing, which is crucial for efficient neuromorphic systems.[105.1] State-of-the-art technologies, such as magnetic tunnel junctions (MTJs), spin-orbit torque, and magnetic skyrmions, are being explored for their potential use in artificial neurons and synapses, further advancing the field.[106.1] The development and implementation of spintronic components within neuromorphic systems present several challenges. Spintronic devices based on antiferromagnetic skyrmion (AFM) motion on nanotracks have gained significant interest as key components for neuromorphic data processing systems.[115.1] Furthermore, 2D spintronic devices are revolutionizing neuromorphic systems by enabling advancements in real-time learning, edge computing, and AI accelerators. For instance, magnetic tunnel junctions (MTJs) exhibit impressive endurance, exceeding 10^15 write cycles, and maintain non-volatile data retention for over a decade, making them well-suited for energy-efficient and long-lasting applications.[116.1] However, spintronic neuromorphic devices constructed from ferromagnetic materials remain sensitive to external magnetic fields, which can alter their dynamics and energy landscape, posing further challenges to their practical use.[117.1] Currently, neuromorphic spintronics is at a low technology readiness level (TRL), with most examples being confined to laboratory setups rather than commercial hardware. This indicates a need for continued research and development to address the existing challenges and facilitate the practical use of spintronic components in neuromorphic computing.[118.1]In this section:
Current Challenges
Technical Limitations
The integration of spintronic devices, particularly those based on gallium nitride (GaN) semiconductors, faces several technical limitations that impact their performance and reliability. One of the primary challenges is the efficient spin injection, which is crucial for establishing the initial spin polarization necessary for effective spin transport in these devices.[141.1] Additionally, issues related to suppressed spin relaxation and artificial spin manipulation are significant hurdles in the development of semiconductor spintronic devices.[141.1] GaN-based semiconductors are considered promising candidates for spintronic applications due to their controllable spin-orbit coupling and high Curie temperature, which exceeds room temperature.[143.1] However, the practical implementation of these materials is complicated by challenges in spin injection, relaxation, and manipulation of itinerant electrons and holes.[142.1] The core functionality of semiconductor spintronic devices relies on converting intrinsic spin information into electrical and optical output signals, making these challenges particularly critical.[141.1] Moreover, the integration of spintronic devices with GaN semiconductors requires addressing unique problems that differ from those encountered in charge-based devices.[140.1] For instance, the spin injection process within ferromagnet/semiconductor heterostructures presents specific difficulties that must be overcome to enhance spin polarization.[158.1] Research into molecular spintronics also highlights challenges related to spin injection at the molecular level, where innovative approaches are being explored to improve spin polarization.[157.1]Future Research Directions
Future research in spintronics is poised to address several critical challenges and explore innovative materials and methodologies to enhance device performance. A significant focus is on the interfaces between organic materials and ferromagnetic electrodes, which can lead to novel phenomena that influence device efficiency. The exploration of functionalized interfaces in organic spintronics is essential for advancing this field.[134.1] Moreover, two-dimensional (2D) materials, such as graphene and transition metal dichalcogenides, are emerging as promising platforms for spintronic research due to their unique spin-dependent properties, including ultra-long spin relaxation times and effective spin manipulation capabilities. These materials can facilitate long-distance spin transport, which is crucial for the development of advanced spintronic devices like magnetic logic gates and magnetic random access memory (MRAM).[135.1] The identification of key properties in magnetic materials is also vital for improving spin injection efficiency. High spin polarization and robust performance at room temperature are among the critical characteristics that future materials must possess.[136.1] In this context, 2D magnetic materials, such as CrX3 and transition metal phosphorous trichalcogenides, are being investigated for their long-range magnetic order and potential applications in spintronics.[144.1] Ferrimagnetic materials are gaining attention due to their stability, low energy consumption, and rapid magnetic state switching capabilities, particularly near magnetic compensation points. These properties make them suitable candidates for future spintronic applications.[145.1] Additionally, radical polymers have shown promise in enhancing spin injection efficiency, indicating a shift towards more innovative materials in the field.[146.1] To bridge the gap between academic research and practical applications in the semiconductor industry, fostering interdisciplinary collaboration is essential. This collaboration can expedite research and enhance the understanding of the phenomena governing spintronics.[156.1] Furthermore, initiatives aimed at improving technology transfer and industry partnerships are crucial for aligning academic research with industrial needs.[155.1]Future Prospects
Potential Impact on Computing
The potential impact of spintronics on computing is significant, as it promises to revolutionize information technologies by leveraging the intrinsic spin of electrons alongside their charge. Spintronics devices are anticipated to replace traditional silicon complementary metal-oxide semiconductor (CMOS) devices, which primarily manipulate charge, with technologies that manipulate spin, thereby enhancing performance and energy efficiency.[165.1] The integration of magnetic materials in computing is expected to lead to devices that operate with reduced energy consumption, marking a transformative shift in the electronics landscape.[164.1] Current research in spintronics is focused on the development of materials that can effectively generate, detect, and manipulate spin, which is crucial for the advancement of spin-based technologies.[165.1] The unique properties of two-dimensional materials, such as graphene and transition metal dichalcogenides, have shown promise in this regard, offering ultra-long spin relaxation times and facilitating long-distance spin transport.[182.1] These advancements could enable the creation of innovative devices such as magnetic logic gates and magnetic random access memory (MRAM), which are essential for next-generation computing systems.[182.1] The field of spintronics, also referred to as spin electronics, focuses on the active control and manipulation of spin degrees of freedom in solid-state systems, which is essential for advancing information processing and storage technologies.[168.1] This area of research emphasizes the fundamental physical principles that underlie the generation of carrier spin polarization, spin dynamics, and spin-polarized transport in semiconductors and metals.[168.1] A key distinction between spin transport and traditional charge transport is that spin is a nonconserved quantity in solids, influenced by factors such as spin-orbit and hyperfine coupling.[166.1] Spintronics has already made significant contributions to revolutionizing information storage, particularly through the enhancement of storage density in hard drives enabled by the development of giant magnetoresistance (GMR)-based read heads.[162.1] Current research is also investigating the integration of spintronics into computing and signal processing, as well as the potential for developing spin-based quantum computers, which could further enhance computational capabilities.[162.1]Integration with Emerging Technologies
The integration of spintronic devices with existing semiconductor technologies is a critical area of focus for advancing the field. This integration relies on harnessing the spin degree of freedom of electrons, in addition to their charge, to process and store information effectively.[178.1] However, several engineering challenges must be addressed to facilitate this transition. For instance, developing hybrid devices that can leverage both spintronic and conventional electronics is essential for the widespread adoption of this technology.[177.1] The integration of spin-orbit torque magnetoresistive random-access memory (SOT-MRAM) with 12-inch complementary metal-oxide-semiconductor (CMOS)-compatible technology presents several key challenges that must be addressed across various fields, including materials science and processing technology. Central to this integration is the design of high-performance magnetic tunnel junctions (MTJs) that utilize spin source materials characterized by low resistivities and large spin Hall angles (SHAs). Additionally, achieving magnetic field-free switching is crucial for the practical implementation of these technologies.[184.1] Moreover, there is a strong global effort to integrate spintronic devices with standard CMOS technology towards the development of hybrid spin-CMOS chips. This integration promises advantages in terms of power consumption, compactness, and speed.[183.1] The SWAN-on-chip concept is being utilized to validate the ‘spintronics technology accelerator’ platform, which aims to create a European-level pathway for the fabrication of monolithically integrated hybrid spintronic/CMOS technologies.[183.1] In addition to these challenges, the exploration of novel spintronic materials, such as organic semiconductors, organic-inorganic hybrid perovskites, and two-dimensional materials, is crucial for developing advanced spintronic devices that can overcome the limitations of traditional materials.[196.1] These materials possess unique properties and multifunctional capabilities that are expected to play a significant role in the future of spintronics, particularly in applications requiring ultra-low power consumption and enhanced performance.[196.1]In this section:
References
[3] Spintronics - GeeksforGeeks — Spintronics, which stands for "spin transport electronics" is a branch of electronics that exploits the intrinsic spin of the electrons and their fundamental electronic charge for the various functionalities in solid-state devices. Unlike traditional electronics which rely solely on the charge of the electrons, spintronics utilizes both charge and spin properties for data storage, processing
[4] Spintronics Applications, Definition, Devices, Future Works - BYJU'S — Spintronics is the study of the spin of an electron and its magnetic moment in solid-state devices. Learn how spintronics is used in mass-storage, medical, and digital electronics, and explore its future works and FAQs.
[8] Spintronic devices: a promising alternative to CMOS devices — The field of spintronics has attracted tremendous attention recently owing to its ability to offer a solution for the present-day problem of increased power dissipation in electronic circuits while scaling down the technology. Spintronic-based structures utilize electron's spin degree of freedom, which makes it unique with zero standby leakage, low power consumption, infinite endurance, a
[9] Spintronics Impact on Electronics Manufacturing - IndustryNet — • Seamless Integration: A significant advantage of spintronics is its compatibility with existing semiconductor manufacturing processes. This means no major overhaul of tools and materials is necessary, allowing for a smoother integration of spintronics technology into current manufacturing lines.
[10] The Role of Spintronics in Next-generation Electronic Devices — However, as we approach the physical limits of miniaturization and performance enhancements in conventional semiconductor technology, researchers have turned their attention to alternative paradigms. Spintronics, or spin electronics, has emerged as a transformative approach that harnesses the intrinsic spin of electrons in addition to their charge.
[11] Recent Advances in Two-Dimensional Spintronics | Discover Nano - Springer — Spintronics is the most promising technology to develop alternative multi-functional, high-speed, low-energy electronic devices. Due to their unusual physical characteristics, emerging two-dimensional (2D) materials provide a new platform for exploring novel spintronic devices. Recently, 2D spintronics has made great progress in both theoretical and experimental researches. Here, the progress
[14] Emerging ferromagnetic materials for electrical spin injection: towards ... — Three key properties are critical for magnetic materials in future spintronic devices to improve the spin injection efficiency, namely high spin polarization, robust room-temperature
[17] Spintronics: Fundamentals and applications - University of Delaware — What is Spintronics?Spintronics is new emerging field of basic and applied research in physics and engineering where "neglected" magnetic degree of freedom of an electron—its spin—is envisaged to be exploited for classical an quantum information processing. Thus, efforts in semiconductor spintronic research are focused on basic problems, such as: coherent manipulation of electron spin at a given location, transporting spins between different locations within conventional semiconductor environment, all-electrical spin control via spin-orbit interactions, diluted magnetic semiconductors, and fixed or mobile spin qubits for quantum computing.GMR ValvesMagnetic Tunnel JunctionsSemiconductor Spintronic DevicesSpin QubitsThe Summer School course deals with fundamental aspects of spin dynamics and transport in semiconductors (spin injection, spin decoherence, spin relaxation, semiclassical and quantum spin-polarized transport, pure spin currents) as well as applications of these ideas and solutions to building new generation of classical information processing devices.
[19] Spintronics - Wikipedia — Spintronics (a portmanteau meaning spin transport electronics), also known as spin electronics, is the study of the intrinsic spin of the electron and its associated magnetic moment, in addition to its fundamental electronic charge, in solid-state devices. The field of spintronics concerns spin-charge coupling in metallic systems; the analogous effects in insulators fall into the field of multiferroics. (1988). The origin of spintronics can be traced to the ferromagnet/superconductor tunneling experiments pioneered by Meservey and Tedrow and initial experiments on magnetic tunnel junctions by Julliere in the 1970s. The use of semiconductors for spintronics began with the theoretical proposal of a spin field-effect-transistor by Datta and Das in 1990 and of the electric dipole spin resonance by Rashba in 1960.
[21] An Overview of Spintronics - SpringerLink — Greater read and write speed because of superior and fast manipulation and controlling of electron spin. Spintronics uses very common metals like Cu, Al, Ag, instead of engineered semiconductor structure. ... 1.8.1 Basic Principle of Working of All Spintronic Devices (Simple Scheme) The information is written and stored in the particular spin
[22] Electronics vs Spintronics - What's the difference? - WikiDiff — In physics terms the difference between electronics and spintronics is that electronics is the study and use of electrical devices that operate by controlling the flow of electrons or other electrically charged particles while spintronics is the storage and transfer of information using the spin state of electrons as well as their charge.
[23] Spintronics - GeeksforGeeks — Spintronics, which stands for "spin transport electronics" is a branch of electronics that exploits the intrinsic spin of the electrons and their fundamental electronic charge for the various functionalities in solid-state devices. Unlike traditional electronics which rely solely on the charge of the electrons, spintronics utilizes both charge and spin properties for data storage, processing
[27] Antiferromagnetic Spintronics: A New Era In Data Storage: A New Era In ... — Antiferromagnetic spintronics has the potential to revolutionize data storage by enabling the development of ultra-fast, low-power, and high-density memory devices. One of the key applications of antiferromagnetic spintronics in computing is the creation of spin-based logic devices that can operate at terahertz frequencies .
[28] Spintronics and Innovative Memory Devices: a Review on Advances in ... — Constant charging of capacitors is not necessary because the data will store as spin-bit in MRAM. Briefly, semiconductor-based spintronics could combine storage, detection, logical, and communication functions in a single chip to produce a multifunctional device that could replace several components .
[29] PDF — Spintronics is poised to revolutionize a variety of electronic applications, notably in memory storage, logic devices, and quantum computing. One of the most promising applications of spintronics is in the development of MRAM. Unlike traditional volatile memory technologies, MRAM utilizes the magnetic state of MTJs to store data.
[42] What is Spintronics, and Why Does it Matter? - AZoNano — A History of Spintronics. Spintronics is concerned with the intrinsic spin state of electrons in solid state devices, the magnetic moment associated with this, and the electrons' charge. The field has its origins in the 1960s, when IBM researchers led by Japanese physicist Leo Esaki discovered spin transfer electronic effects and their potential.
[43] Spintronics - Wikipedia — Spintronics (a portmanteau meaning spin transport electronics), also known as spin electronics, is the study of the intrinsic spin of the electron and its associated magnetic moment, in addition to its fundamental electronic charge, in solid-state devices. The field of spintronics concerns spin-charge coupling in metallic systems; the analogous effects in insulators fall into the field of multiferroics. (1988). The origin of spintronics can be traced to the ferromagnet/superconductor tunneling experiments pioneered by Meservey and Tedrow and initial experiments on magnetic tunnel junctions by Julliere in the 1970s. The use of semiconductors for spintronics began with the theoretical proposal of a spin field-effect-transistor by Datta and Das in 1990 and of the electric dipole spin resonance by Rashba in 1960.
[45] The History and Future of Spintronics - Serious Science — In contrast, in the relatively new field of spintronics, currents are generated by the electrons’ spin or magnetic moment. Right now, this field is creating its first “airplanes,” but in the future, it will build modern, fast, and widely available ‘aircraft.’ Research in spintronics is currently being conducted at the Mikron company in Zelenograd, at the Institute of Problems of Chemical Physics and Medicinal Chemistry in Chernogolovka, at the Far Eastern Federal University, at Crocus Nano Electronics, MIREA, MIPT, Moscow State University, Skolkovo, and other organizations. Unlike other technologies, spintronic devices can be vulnerable to magnetic fields while consuming little energy. Today, this “daughter” of electronics is used in various fields and promises to deliver even more breakthroughs soon—both in understanding physical processes and in the applicability of new materials and heterostructures for engineering projects.
[46] Origin, Development, and Future of Spintronics (Nobel Lecture) — Going for a spin: The discovery of giant magnetoresistance (GMR) opened up a new area of technology—spintronics—which, in contrast to conventional electronics, uses not only the charge, but also the spin of the electron.Applications of GMR have revolutionized hard-disk technology (see picture). Albert Fert, Nobel laureate in Physics 2007, describes firsthand the discovery of GMR and the
[48] Integration of the evaporable spin-crossover complex [Fe(HB(1,2,4 ... — However, significant challenges arise in maintaining device functionalities and ensuring synergy with the molecular properties. Here, we described three different ways of incorporating thin films of the molecular spin crossover (SCO) complex [Fe(HB(1,2,4-triazol-1-yl) 3) 2] into an organic field-effect transistor (OFET) device. The fabrication
[50] An Introduction to Semiconductor Spintronics — The integration of semiconductor heterostructures with magnetic materials may be viewed as a natural outcome of these remarkable advances and has led to a burgeoning new field—"semiconductor spintronics"—that lies squarely at the nexus between these usually disparate areas of science and technology. 6, 7, 8 Semiconductor spintronics is broadly aimed at the manipulation of spin
[52] Spintronic devices: a promising alternative to CMOS devices — The field of spintronics has attracted tremendous attention recently owing to its ability to offer a solution for the present-day problem of increased power dissipation in electronic circuits while scaling down the technology. Spintronic-based structures utilize electron's spin degree of freedom, which makes it unique with zero standby leakage, low power consumption, infinite endurance, a
[57] PDF — The hard-disk drive industry was worth US$46 billion in 1996, and is growing rapidly. IBM predicts that giant magnetoresistance will have a big impact on hard drives, allowing bit densities to continue to grow at 60 per cent a year, writes Toby Chapman.
[58] Surface and interface effects in the growth of giant magnetoresistance ... — The giant magnetoresistance (GMR) effect is playing a key role in maintaining growth rates in ultrahigh-density data storage in computer hard-disk drives. By the end of the year 2000, all computer hard-disk drives manufactured worldwide will use a GMR thin film as the read-head.
[59] A brief introduction to giant magnetoresistance — Abstract: Giant magnetoresistance (GMR) is a quantum mechanical magnetoresistance effect observed in thin film structures composed of alternating ferromagnetic and nonmagnetic layers. The effect manifests itself as a significant decrease (typically 10- 80%) in electrical resistance in the presence of a magnetic field. The effect is exploited commercially by manufacturers of hard disk drives
[61] PDF — Albert Fert's experimental data (1988) Matthew Melissa - Physics 141A - Spring 2013 7 Basic Mechanism ... • Advantages - Increased storage density - Faster readout Figure 13.HDD with GMR read head Figure 14. ... "Giant Magnetoresistance in Layered Magnetic Materials."
[62] Better storage performance thanks to the GMR effect — The GMR (giant magnetoresistance) effect propelled modern information technology a huge step forward: thanks to this, it was possible to develop read heads for computer hard drives in the 1990s and increase the drives' storage capacity to gigabytes. ... it was possible to develop read heads for computer hard drives in the 1990s and increase
[67] The promise of spintronics for unconventional computing — A key element of spintronic technology is the magnetic tunnel junction ... There have been two main milestones during the development of these devices towards the integration with CMOS technology: ... shows MTJ-based spintronic devices compared against CMOS with memory as the device type of comparison. The existing memory hierarchy is
[84] Spin (physics) - History - LiquiSearch — In 1940, Pauli proved the spin-statistics theorem, which states that fermions have half-integer spin and bosons integer spin. In retrospect, the first direct experimental evidence of the electron spin was the Stern-Gerlach experiment of 1922. However, the correct explanation of this experiment was only given in 1927.
[85] (PDF) Electron Spin and Its History - ResearchGate — Early in 1928, Paul A.M. Dirac, then 25, proposed his relativistic wave equation for the electron (18). From this equation, which is based on very general principles of Lorentz invariance, electron
[86] How the Stern-Gerlach experiment made physicists believe in quantum ... — A century ago, the German physicists Otto Stern and Walther Gerlach carried out an experiment that gave an important credibility boost to the new-fangled notion of quantum mechanics. ... by the spin of silver's unpaired electron. Indeed, the Stern-Gerlach experiment is now interpreted as evidence of electron spin, rather than as proof of
[94] Two-Dimensional Metal-Organic Frameworks Towards Spintronics — The recent advances of spintronics based on two-dimensional metal-organic frameworks (2D MOFs) were summarized in terms of spintronics materials, application of 2D MOFs in spin transport, as well as spin manipulation using 2D MOFs with bipolar magnetic semiconductor (BMS) characteristics.
[95] 2D Spintronics for Neuromorphic Computing with Scalability and Energy ... — This review paper summarizes recent progress in the use of spintronics for neuromorphic computing, with a particular focus on the outlook and future directions for integrating 2D spintronic materials into neuromorphic hardware.
[100] What Are Spintronics? And How Do They Work? - First4Magnets — Why Spintronics? Spintronic devices offer several advantages over traditional electronic devices: Higher Speed: Spin states can switch faster than charge states, enabling quicker data processing.; Reduced Power Consumption: Spintronic devices can be more energy-efficient since they rely less on the movement of charge.; Non-volatility: Certain spintronic memory devices retain information even
[101] Shift From Electronics To Spintronics - scind.org — Spin orientation of conduction electrons survives for a relatively long time (nanoseconds, compared to tens of femtoseconds during which electron momentum decays), which makes spintronic devices particularly attractive for memory storage and magnetic sensors applications, and, potentially for quantum computing where electron spin would represent a bit (called qubit) of information. By aligning electrons’ spin state to that of the magnetic field in the layers of the drive head, GMR technology dramatically reduces resistance, speeding up data transfer. Either adding the spin degree of freedom to conventional charge-based electronic devices or using the spin alone has the potential advantages of non-volatility, increased data processing speed, decreased electric power consumption, and increased integration densities compared with conventional semiconductor devices.
[104] Neuromorphic Spintronics - PMC — An advantage of spintronics for neuromorphic computing is the multifunctionality that it offers, allowing designers to craft behaviors ranging from non-volatile through plastic, oscillatory, to stochastic, all from very similar materials. ... or benefits (lower energy consumption by harnessing thermal processes). Spintronics, which allows the
[105] 2D Spintronics for Neuromorphic Computing with Scalability and Energy ... — This review paper summarizes recent progress in the use of spintronics for neuromorphic computing, with a particular focus on the outlook and future directions for integrating 2D spintronic materials into neuromorphic hardware. ... and scalability of spintronic devices offer transformative benefits. These devices enable real-time, localized
[106] Prospect of Spintronics in Neuromorphic Computing — Here, the development of neuromorphic computing with reference to spintronics is reviewed. The state-of-the-art spintronic technologies, such as the magnetic tunnel junction, spin-orbit torque, domain wall propagation, magnetic skyrmions, and antiferromagnet, are highlighted and how they can used for artificial neurons and synapses in
[107] 2D conductive metal-organic frameworks for electronics and spintronics ... — Two-dimensional (2D) materials showcase great potentials in both fundamental research and technology development, thanks to their unique chemical and physical properties that are usually not available in corresponding bulk counterparts. As an emerging class of 2D materials, 2D conductive metal-organic frameworks (2D c-MOFs) exhibit the characteristics of pre-designable and tunable structures
[115] 2D Spintronics for Neuromorphic Computing with ... - ResearchGate — Spintronic devices based on antiferromagnetic skyrmion (AFM) motion on the nanotracks have gained significant interest as a key component of neuromorphic data processing systems.
[116] 2D Spintronics for Neuromorphic Computing with Scalability and Energy ... — 2D spintronic devices are revolutionizing neuromorphic systems, enabling advancements in real-time learning, edge computing, and AI accelerators. MTJs, for example, exhibit impressive endurance, exceeding 10 15 write cycles, and maintain non-volatile data retention for over a decade, making them well-suited for energy-efficient, long-lasting
[117] Neuromorphic computing with spintronics | npj Spintronics - Nature — Spintronic neuromorphic devices built of ferromagnetic materials will always be sensitive to magnetic fields as these will alter the dynamics and energy landscape of the device elements.
[118] (PDF) Neuromorphic computing with spintronics - ResearchGate — Neuromorphic spintronics is still at a very low TRL, with most e x a m p l e sb a s e do nl a b o r a t o r y - b u i l ts e t u p sr a t h e rt h a nc o m m e r c i a l hardware.
[134] Innovation of Materials, Devices, and Functionalized Interfaces in ... — The interfaces between organic materials and ferromagnetic electrodes in spintronic devices are diverse and can lead to many novel phenomena that influence the device performance. In this review, the novel organic materials, innovative devices, and functionalized interfaces in organic spintronics are comprehensively introduced.
[135] Spintronics in Two-Dimensional Materials - PMC — Additionally, 2D materials, such as graphene , black phosphorus (BP) , transition metal dichalcogenides (TMDCs) , and silicene , have created an excellent platform for spintronic research due to their unique spin-dependent properties, like ultra-long spin relaxation time and spin diffusion length, Rashba spin–orbit coupling (SOC), spin–valley locking, and quantum spin Hall effect. Along the way, 2D materials and related heterostructures can accomplish long-distance spin transport and effective spin manipulation, thereby realizing magnetic logic gates, magnetic random access memory (MRAM) , and other spintronic devices. The mainstream strategy is through introducing vacancies or adding adatoms in 2D materials that uses unpaired electrons to obtain local magnetic moments , such as hydrogenated graphene [16–19] (Fig. 1a), vacancy graphene (Fig. 1b), and graphene nanoribbons [22–24] (Fig. 1c).
[136] Emerging ferromagnetic materials for electrical spin injection: towards ... — Three key properties are critical for magnetic materials in future spintronic devices to improve the spin injection efficiency, namely high spin polarization, robust room-temperature
[140] Challenges for semiconductor spintronics | Nature Physics — Challenges and advances in semiconductor spintronics Logic Improving or optimizing a spintronic device requires attention to very different problems than for charge-based devices.
[141] Spin injection, relaxation, and manipulation in GaN-based semiconductors — The core of these semiconductor spintronic devices is to convert the intrinsic spin information into electrical and optical output signals. Hence, efficient spin injection, suppressed spin relaxation, and artificial spin manipulation are issues worthy of attention in semiconductor spintronic device development.
[142] Spin injection, relaxation, and manipulation of carriers in GaN-based ... — Gallium nitride-based (GaN-based) semiconductors have gained considerable interest from researchers in the community of semiconductor spintronics owing to their electric-field controllable spin-orbit coupling and because their Curie temperature is higher than room temperature. Spin injection, relaxation, and manipulation of itinerant electrons and holes are critical issues in
[143] Spintronics in GaN‐Based Semiconductors: Research Progress, Challenges ... — GaN-based semiconductors are deemed to be a potential candidate for developing spintronic devices owing to the artificially controllable spin-orbit coupling and the high Curie temperature of GaN
[144] Two-dimensional magnetic materials for spintronic devices — Benefiting from their long-range magnetic order in monolayer thickness and weak interlayer van der Waals forces, two-dimensional (2D) magnetic materials offer an ideal platform for the study of magnetism and other novel physical effects in the 2D limit, and open up a new way for the development of novel spintronic devices. In this review, we focus on several representative 2D magnetic materials including CrX3 (X \= Cl, Br, I), transition metal phosphorous trichalcogenides MPX3 (M \= Mn, Fe, Ni; X \= S, Se), Cr2Ge2Te6, Fe3GeTe2, Fe3GaTe2, CrSBr and magnetic Janus monolayers, and discuss their basic physical properties and modulation method, especially the electrical control of magnetism. A review on two-dimensional (2D) magnetic materials and their potential applications in spintronics and spin-caloritronic
[145] Spin-Orbit Torque-Assisted Detection of the Canted Magnetization Phase ... — Ferrimagnets have the potential to play a key role in spintronics due to their high stability, low energy consumption, and rapid magnetic state switching. These characteristics are typically observed in ferrimagnetic materials near magnetic or angular compensation states. Near the magnetic compensation point, an external field can disrupt the collinearity between the sublattices, leading to
[146] Verdazyl radical polymers for advanced organic spintronics — The substantial spin mixing conductance is promising, and these results establish the potential of radical polymers in emerging spin-based applications. ... making efficient spin injection
[155] "Real impact": Challenges and opportunities in bridging the gap between ... — In the context of academic research, impact describes the demonstrable benefits of research outputs and activities on stakeholders, generally measured in terms of reach (how widespread the impact is) and significance (importance of the impact) (Bornmann, 2013; Reed et al., 2023). Within some sectors of academia and related research institutions, impact related initiatives such as technology transfer offices, industry partnerships, collaborative research and innovation programs are making efforts to improve the alignment between academic research and industrial application (Donne et al., 2021, Maritz et al., 2021). We seek to deliver change and greater debate on impact and foster an open discussion by developing a broad perspective that collates the views of a number of experts from academia, practice, and policy to generate meaningful impact of academic research.
[156] Spintronics: The Future Of Electronics With Magnetic Materials — As the exploration of spintronics continues, interdisciplinary collaboration will become increasingly vital. Scientists from various fields must coalesce to overcome existing technical challenges. This synergy between disciplines will not only expedite research but also foster a deeper understanding of the underlying phenomena governing
[157] Challenges and Prospects of Molecular Spintronics - PMC — Keywords: Molecular spintronics, spin transport, spintronic materials, spin injection, spinterface effect, spin-related functionality. 1. Introduction ... Challenges in Spinterface and Spin Injection Research. In spintronic devices, spin injection is a preprocess of carrier transport, determining the initial spin polarization of spin transport.
[158] Emerging ferromagnetic materials for electrical spin injection: towards ... — After this brief overview of spintronics concepts and developments in section 1, we illustrate the challenges during the electrical spin injection within FM/semiconductor heterostructure in section 2.
[162] An Overview of Spintronics - SpringerLink — See our privacy policy for more information on the use of your personal data. Chapter Chapter Spintronics concerns the utilization of solely spin or in combination with charge to derive requisite functionality for Information Processing and Storing Digital Information. Technology related to Spintronics has already revolutionized Information Storing, i.e., the storage density of hard drives with the advent of GMR-based read head of a magnetic hard disk drive. Recent research activities include implementation and involvement of Spintronics in the field of Computing and Signal Processing, and Spin-based Quantum Computers. Access this chapter Download Article/Chapter or eBook Chapter Buy Chapter Author information Authors Dey, P., Roy, J.N. Access this chapter Download Article/Chapter or eBook Chapter Buy Chapter Author information About this chapter
[164] Spintronics: The Future Of Electronics With Magnetic Materials — Future Prospects of Spintronics. The imminent landscape of electronics is set to undergo a profound transformation with the advent of spin-based technologies. Researchers are optimistic about how magnetic materials can revolutionize computing, creating avenues for devices that operate with decreased energy consumption. The integration of
[165] Prospects of spintronics based on 2D materials — Spintronics holds the promise for future information technologies. Devices based on manipulation of spin are most likely to replace the current silicon complementary metal-oxide semiconductor devices that are based on manipulation of charge. The challenge is to identify or design materials that can be used to generate, detect, and manipulate spin.
[166] Spintronics: Fundamentals and applications : Igor Zutic : Free Download ... — The primary focus is on the basic physical principles underlying the generation of carrier spin polarization, spin dynamics, and spin-polarized transport in semiconductors and metals. Spin transport differs from charge transport in that spin is a nonconserved quantity in solids due to spin-orbit and hyperfine coupling.
[168] Spintronics: Fundamentals and applications | Rev. Mod. Phys. — Spintronics, or spin electronics, involves the study of active control and manipulation of spin degrees of freedom in solid-state systems. This article reviews the current status of this subject, including both recent advances and well-established results. The primary focus is on the basic physical principles underlying the generation of carrier spin polarization, spin dynamics, and spin
[177] PDF — The seamless integration of spintronic components with existing semiconductor technologies poses significant engineering challenges. Developing hybrid devices that can leverage both spintronic and conventional electronics will be crucial for the widespread adoption of this technology. Ensuring the reliability and stability of spintronic devices
[178] 2D Spintronics for Neuromorphic Computing with Scalability and Energy ... — The integration of spintronic devices into computing systems relies on harnessing the spin degree of freedom of electrons, in addition to their charge, to process and store information. ... and compatibility with existing semiconductor technologies. Room-temperature quantum spintronics is another transformative area, enabling the manipulation
[182] Spintronics in Two-Dimensional Materials - PMC — Additionally, 2D materials, such as graphene , black phosphorus (BP) , transition metal dichalcogenides (TMDCs) , and silicene , have created an excellent platform for spintronic research due to their unique spin-dependent properties, like ultra-long spin relaxation time and spin diffusion length, Rashba spin–orbit coupling (SOC), spin–valley locking, and quantum spin Hall effect. Along the way, 2D materials and related heterostructures can accomplish long-distance spin transport and effective spin manipulation, thereby realizing magnetic logic gates, magnetic random access memory (MRAM) , and other spintronic devices. The mainstream strategy is through introducing vacancies or adding adatoms in 2D materials that uses unpaired electrons to obtain local magnetic moments , such as hydrogenated graphene [16–19] (Fig. 1a), vacancy graphene (Fig. 1b), and graphene nanoribbons [22–24] (Fig. 1c).
[183] PDF — A non-exhaustive list of key activities comprises sen-sors, spin-based technologies for ultra-low power appli-cations, edge and in-memory computing, MRAMs and advanced sensors, beyond-CMOS logic, novel paradigms for computing, innovative hardware solutions for AI, rad-hard spin-based solution bringing novel functionalities to space applications, chiplets with spintronic technology, etc. Today there is a strong effort worldwide to integrate spintronic devices with standard CMOS technology towards hybrid spin-CMOS chips, offering advantages in terms of power consumption, compactness, and speed. The SWAN-on-chip concept will be used to validate the ‘spintronics technology accelerator’ platform, where the spintronics equivalent circuit models (Spin-EC) and spin-tronics multi-project wafer (Spin-MPW) will create a European-level pathway for the fabrication of monolith-ically integrated hybrid Spintronic/CMOS technologies required for boosting devices up the spintronics value chain.
[184] Challenges and opportunities for spintronics based on spin orbit torque ... — To integrate SOT-MRAMs with 12-inch COMS-compatible technology, a number of key issues, in fields ranging from materials science to processing technology, need to be addressed. Designing high-performance MTJs using spin source materials with low resistivities and large SHAs and realizing magnetic field-free switching is central to the practical
[196] Emerging Spintronic Materials and Functionalities - Guo - Advanced ... — Currently, many novel spintronic materials have been developed with unique properties and multi-functionalities, including organic semiconductors (OSCs), organic-inorganic hybrid perovskites (OIHPs), and two-dimensional materials (2DMs). These materials are useful to fulfil the demand for developing diverse and advanced spintronic devices.