Applied Physics Letters · 2018 · 19 citations · 16 references
Natural SciencesMaterials EngineeringMaterials ScienceElectromagnetismElectronic MaterialsMagnetic MaterialsFerromagnetic MaterialsFerromagnetismMagnetism In SolidsSpintronic MaterialsSpintronicsThin Film Magnetic PropertiesFerromagnetic SemiconductorsMagnetic HeterostructuresMagnetic SemiconductorsMagnetic Tunnel JunctionsMagnetoresistanceNumerical Device SimulationNumerical SimulationThin Oxide Layers
We fabricated a magnetic tunnel junction (MTJ) using an MgO barrier and MnGa electrode, which shows large magnetic anisotropy, and we investigated the spin torque diode effect in the MTJ. The magnetoresistance ratio increased up to approximately 40% by inserting thin FeB/Fe layers at the MnGa/MgO interface. The obtained diode effect was as high as 70 GHz, which is thought to occur due to the coupled precession acoustic mode in the MnGa/Fe-B multi-layer. Numerical simulation suggests that a very high frequency diode signal of more than 150 GHz can be expected in the optical mode precession.
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Microwave oscillations of a nanomagnet driven by a spin-polarized current
S. I. Kiselev, Jack C. Sankey, I. N. Krivorotov et al. · Nature · 2003 · 2K citations · Full text
Spin-torque diode effect in magnetic tunnel junctions
Ashwin A. Tulapurkar, Yoshishige Suzuki, Akio Fukushima et al. · Nature · 2005 · 822 citations