Chemistry of Materials · 2016 · 26 citations · 38 references
Natural SciencesMaterials EngineeringMaterials ScienceMagnetic MaterialsNanomaterialsNanotechnologyFerromagnetic MaterialsFerromagnetismMagnetic Energy MaterialsMagnetic NanomaterialsMagnetization ProcessesNanostructured Energy MaterialsCore-shell Magnetic NanostructuresCore-shell NanostructuresEnergyExchange Spring MagnetsMagnetic NanoparticlesNanomagnetismNanoparticlesNanostructured Ferromagnets
Systematic growth of a soft-magnet Co shell (0.6 to 2.7 nm thick) around a hard-magnet Fe 0.65 Pt 0.35 core (5 nm in diameter) has been achieved in a one-pot microwave synthesis. This controlled growth led to a 4-fold enhancement in the energy product of the core–shell assembly as compared to the energy product of bare Fe 0.65 Pt 0.35 nanoparticles. The simultaneous enhancement of coercivity and saturation moment reflects the onset of theoretically predicted exchange-spring behavior. The demonstration of nanoscale exchange-spring magnets can lead to improved high-performance magnet design for energy applications.
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Exchange-coupled nanocomposite magnets by nanoparticle self-assembly
Hao Zeng, Jing Li, J. P. Liu et al. · Nature · 2002 · 1.6K citations
Natural Sciences, Materials Engineering, Materials Science +12
Beating the superparamagnetic limit with exchange bias
V. Skumryev, S. Stoyanov, Yong Zhang et al. · Nature · 2003 · 1.6K citations