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arXiv · 1409.2846

Magnetization pumping and dynamics in a Dzyaloshinskii-Moriya magnet

Alexey A. Kovalev·Utkan Güngördü
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Abstract

We formulate a phenomenological description of thin ferromagnetic layers with inversion asymmetry where the single-domain magnetic dynamics experiences magnon current-induced torques and leads to magnon-motive forces. We first construct a phenomenological theory based on irreversible thermodynamics, taking into account the symmetries of the system. Furthermore, we confirm that these effects originate from Dzyaloshinskii-Moriya interactions from the analysis based on the stochastic Landau-Lifshitz-Gilbert equation. Our phenomenological results generalize to a general form of Dzyaloshinskii-Moriya interactions and to other systems, such as pyrochlore crystals and chiral magnets. Possible applications include spin current generation, magnetization reversal and magnonic cooling.

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Alexey A. Kovalev, Utkan Güngördü. 2014-09-09. Magnetization pumping and dynamics in a Dzyaloshinskii-Moriya magnet. https://doi.org/10.1209/0295-5075/109/67008

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