Unconventional scaling and significant enhancement of the spin Seebeck effect in multilayers

多層膜構造におけるスピンゼーベック効果の増強と非従来型スケーリング

Ramos, R.*; 吉川 貴史*; Aguirre, M.*; Lucas, I.*; Anadn, A.*; 小宅 教文*; 内田 健一*; 安立 裕人; 塩見 淳一郎*; Algarabel, P. A.*; Morelln, L.*; 前川 禎通; 齊藤 英治; Ibarra, M. R.*

Ramos, R.*; Kikkawa, Takashi*; Aguirre, M.*; Lucas, I.*; Anadn, A.*; Oyake, Takafumi*; Uchida, Kenichi*; Adachi, Hiroto; Shiomi, Junichiro*; Algarabel, P. A.*; Morelln, L.*; Maekawa, Sadamichi; Saito, Eiji; Ibarra, M. R.*

Spin Seebeck effects have been investigated in highly crystalline magnetic multilayer films. Voltage as well as power generated by the spin Seebeck effect were found to be significantly enhanced with increasing the number of layers, . This voltage enhancement defies the simple understanding of the spin Seebeck effect and suggests that spin current flowing between the magnetic layers in the thickness direction plays an important role in the multilayer SSE systems and the observed voltage enhancement.