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Magnetic Damping Modulation in IrMn_{3}/Ni_{80}Fe_{20} via the Magnetic Spin Hall Effect
José Holanda1, Hilal Saglam1,2,3, Vedat Karakas4
1Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
Abstract:
Noncollinear antiferromagnets can have additional spin Hall effects due to the net chirality of their magnetic spin structure, which provides for more complex spin-transport phenomena compared to ordinary nonmagnetic materials. Here we investigated how ferromagnetic resonance of permalloy (Ni_{80}Fe_{20}) is modulated by spin Hall effects in adjacent epitaxial IrMn_{3} films. We observe a large dc modulation of the ferromagnetic resonance linewidth for currents applied along the [001] IrMn_{3} direction. This very strong angular dependence of spin-orbit torques from dc currents through the bilayers can be explained by the magnetic spin Hall effect where IrMn_{3} provides novel pathways for modulating magnetization dynamics electrically.
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