Spin Seebeck mechanical force

Kazuya Harii (), Yong-Jun Seo, Yasumasa Tsutsumi, Hiroyuki Chudo, Koichi Oyanagi, Mamoru Matsuo, Yuki Shiomi, Takahito Ono, Sadamichi Maekawa and Eiji Saitoh
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Kazuya Harii: Japan Atomic Energy Agency
Yong-Jun Seo: Tohoku University
Yasumasa Tsutsumi: RIKEN Center for Emergent Matter Science
Hiroyuki Chudo: Japan Atomic Energy Agency
Koichi Oyanagi: Tohoku University
Mamoru Matsuo: RIKEN Center for Emergent Matter Science
Yuki Shiomi: RIKEN Center for Emergent Matter Science
Takahito Ono: Tohoku University
Sadamichi Maekawa: Japan Atomic Energy Agency
Eiji Saitoh: Japan Atomic Energy Agency

Nature Communications, 2019, vol. 10, issue 1, 1-5

Abstract: Abstract Electric current has been used to send electricity to far distant places. On the other hand, spin current, a flow of electron spin, can in principle also send angular momentum to distant places. In a magnet, there is a universal spin carrier called a spin wave, a wave-type excitation of magnetization. Since spin waves exhibit a long propagation length, it should be able to send angular momentum that can generate torque and force at a distant place: a new function of magnets. Here we observe mechanical angular momentum transmission and force generation due to spin waves injected into Y3Fe5O12 by the spin-Seebeck effect. The spin-wave current, transmitted through a Y3Fe5O12 micro cantilever, was found to create a mechanical force on the cantilever as a non-local reaction of the spin-Seebeck effect. Spin-wave current can be generated remotely even in open circuits, and it can be used to drive micro mechanical devices.

Date: 2019
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DOI: 10.1038/s41467-019-10625-y

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