2021/10/27 by Ritwik Mondal, Akashdeep Kamra · 1 citation
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.other
paper · pdf · doi:10.1103/physrevb.104.214426
published as Phys. Rev. B 104, 214426 (2021) · 7 pages, 6 figures
arxiv created 2021/10/27 · arxiv updated 2022/01/03
We investigate spin pumping current injected by the nutation resonances of a ferromagnet or an antiferromagnet into an adjacent metal. Comparing the dc spin pumping current between the normal precession and nutation resonances, we find that the ratio of spin pumping current at the nutation resonance to the precession resonance is more pronounced in antiferromagnets. We further show that the spin pumping current injected by the nutation resonance is opposite in sign as compared to the normal precession mode. This could offer a useful experimental signature for identifying such nutation resonances. Analyzing the nature of the nutational eigenmodes, we show that the sign change in spin current is rooted in a reversal of the precession sense for the nutation mode(s). Furthermore, the nutational modes in antiferromagnets are found to be dominated by precession of one of the two sublattices only.