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Numerical study on the spin Seebeck effect in ferromagnetic insulators

スピンゼーベック効果に対する数値解析

大江 純一郎; 安立 裕人; 高橋 三郎; 前川 禎通

Oe, Junichiro; Adachi, Hiroto; Takahashi, Saburo; Maekawa, Sadamichi

強磁性絶縁体中で観測されたスピンゼーベック効果に対する理論解析を紹介する。特に、磁化のダイナミクスを表すLandau-Lifshitz-Gilbert方程式を数値的に解くことで、温度勾配によって流れるスピン波スピン流と、逆スピンホール効果を用いた観測量について言及する。

In this report, we show the numerical study on the spin Seebeck effect by considering the magnetization dynamics in the presence of thermal gradient. The dynamics of the magnetization is given by solving the Landau-Lifshitz-Gilbert equation. We introduce the random magnetic field originated from finite temperatures which depends on the position. We calculate the spin current driven by the magnon in ferromagnetic sample. We also discuss the spin pumping to the normal probe attached to the sample for detecting the spin current.

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