Spin Seebeck mechanical force

Kazuya Harii, Yong Jun Seo, Yasumasa Tsutsumi, Hiroyuki Chudo, Koichi Oyanagi, Mamoru Matsuo, Yuki Shiomi, Takahito Ono, Sadamichi Maekawa, Eiji Saitoh

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


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.

Original languageEnglish
Article number2616
JournalNature Communications
Issue number1
Publication statusPublished - 2019 Dec 1


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