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arXiv · 1804.05151

Correlation between Dzyaloshinskii Moriya interaction and spin mixing conductance at antiferromagnet / ferromagnet interface

Xin Ma·Guoqiang Yu·Seyed A. Razavi·Liang Chang·Lei Deng·Zhaodong Chu·Congli He·Kang L. Wang·Xiaoqin Li
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Abstract

The rich interaction phenomena at antiferromagnet (AFM)/ ferromagnet (FM) interfaces are key ingredients in AFM spintronics, where many underlying mechanisms remain unclear. Here we report a correlation observed between interfacial Dzyaloshinskii-Moriya interaction (DMI) Ds and effective spin mixing conductance g at IrMn/CoFeB interface. Both Ds and g are quantitatively determined with Brillouin light scattering measurements, and increase with IrMn thickness in the range of 2.5~7.5 nm. Such correlation likely originates from the AFM-states-mediated spin-flip transitions in FM, which promote both interfacial DMI and spin pumping effect. Our findings provide deeper insight into the AFM-FM interfacial coupling for future spintronic design.

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Xin Ma, Guoqiang Yu, Seyed A. Razavi, Liang Chang, Lei Deng, Zhaodong Chu, Congli He, Kang L. Wang, Xiaoqin Li. 2018-04-14. Correlation between Dzyaloshinskii Moriya interaction and spin mixing conductance at antiferromagnet / ferromagnet interface. https://doi.org/10.1103/physrevb.98.104428

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