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arXiv · 1911.00943

Magnetic damping modulation in $IrMn_{3}/Ni_{80}Fe_{20}$ via the magnetic spin Hall effect

Jose Holanda·Hilal Saglam·Vedat Karakas·Zhizhi Zang·Yi Li·Ralu Divan·Yuzi Liu·Ozhan Ozatay·Valentine Novosad·John E. Pearson·Axel Hoffmann
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Abstract

Non-collinear 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 non-magnetic 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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Jose Holanda, Hilal Saglam, Vedat Karakas, Zhizhi Zang, Yi Li, Ralu Divan, Yuzi Liu, Ozhan Ozatay, Valentine Novosad, John E. Pearson, Axel Hoffmann. 2019-11-03. Magnetic damping modulation in $IrMn_{3}/Ni_{80}Fe_{20}$ via the magnetic spin Hall effect. https://doi.org/10.1103/physrevlett.124.087204

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