Magnetization dynamics in holographic ferromagnets; Landau-Lifshitz equation from Yang-Mills fields

Yokoi, Naoto*; Sato, Koji*; Saito, Eiji

We introduce a new approach to understand magnetization dynamics in ferromagnets based on the holographic realization of ferromagnets. A Landau-Lifshitz equation describing the magnetization dynamics is derived from a Yang-Mills equation in the dual gravitational theory, and temperature dependences of the spin-wave stiffness and spin transfer torque appearing in the holographic Landau-Lifshitz equation are investigated by the holographic approach. The results are consistent with the known properties of magnetization dynamics in ferromagnets with conduction electrons.

Language	:	English
Journal	:	Physical Review D
Volume	:	100
Number	:	10
Pages	:	p.106012_1 - 106012_9
Publication Year/Month	:	2019/11
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Paper URL	:	https://doi.org/10.1103/PhysRevD.100.106012
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Keywords	:	ランダウリフシッツ方程式; ヤンミルズ場; 磁化ダイナミクス
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Registration No. : AA20220600
JAEA Abstracts No. :
Paper Submission No. : 25958

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