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arXiv · 2208.00622

Calculation of magnon drag force induced by an electric current in ferromagnetic metals

Hiroshi Funaki·Gen Tatara
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Abstract

Magnon drag effect induced by an applied electric field in ferromagnetic metals is theoretically studied by a microscopic calculation of the force on magnons arising from magnon emission/absorption and scattering due to driven electrons. It is shown that magnon scattering contribution dominates over the emission/absorption one in a wide temperature regime in good metals with long elastic lifetime $\taue$, as the latter has a relative suppression factor of $(\Deltasd\taue)^{-2}$ due to the electron spin flip by the magnon, where $\Deltasd$ is the $sd$ exchange interaction energy. Spin-transfer efficiency is discussed including the magnon drag effect.

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Hiroshi Funaki, Gen Tatara. 2022-08-01. Calculation of magnon drag force induced by an electric current in ferromagnetic metals. https://doi.org/10.1103/physrevb.106.134435

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