Magnetization pumping and dynamics in a Dzyaloshinskii-Moriya magnet

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.

arXiv comment6 pages and 1 figure

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Cited by in corpus (7)

• Skyrmions in Magnetic Multilayers
• Stability of skyrmion lattices and symmetries of quasi-two-dimensional chiral magnets
• Spin torque and Nernst effects in Dzyaloshinskii-Moriya ferromagnets
• Thermally induced magnonic spin current, thermomagnonic torques and domain wall dynamics in the presence of Dzyaloshinskii-Moriya interaction
• The inverse thermal spin-orbit torque and the relation of the Dzyaloshinskii-Moriya interaction to ground-state energy currents
• Pumping of magnons in a Dzyaloshinskii-Moriya ferromagnet
• Theory of magnon motive force in chiral ferromagnets