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20 August 2020 Spin-orbit torque in magnetic heterostructures from first principles
Kirill D. Belashchenko, Giovanni G. Baez Flores, Wuzhang Fang, Alexey A. Kovalev, Mark van Schilfgaarde
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Proceedings Volume 11470, Spintronics XIII; 114701J (2020) https://doi.org/10.1117/12.2567434
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
Spin-orbit torque in metallic heterostructures arises due to multiple microscopic mechanisms, which presents a challenge for theoretical understanding and interpretation of the experimental data. First-principles calculations provide valuable insight through controlled studies of the dependence of spin-orbit torques on the relevant parameters in realistic disordered heterostructures. Recent results from such calculations and progress in understanding the mechanisms of spin-orbit torque will be discussed. It was found that the damping-like torque in ferromagnet/heavy-metal bilayers tends to have a large interfacial contribution that is comparable to the conventional spin-Hall contribution. Calculations with varying degrees of interfacial intermixing show that it does not strongly affect the damping-like torque but can strongly enhance the field-like torque. Recent results for ferromagnet/normal-metal/ferromagnet trilayers and antiferromagnet/normal-metal bilayers will also be discussed.
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Kirill D. Belashchenko, Giovanni G. Baez Flores, Wuzhang Fang, Alexey A. Kovalev, and Mark van Schilfgaarde "Spin-orbit torque in magnetic heterostructures from first principles", Proc. SPIE 11470, Spintronics XIII, 114701J (20 August 2020); https://doi.org/10.1117/12.2567434
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KEYWORDS
Heterojunctions
Ferromagnetics
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