Observation of spin-current striction in a magnet

Hiroki Arisawa (), Hang Shim, Shunsuke Daimon, Takashi Kikkawa, Yasuyuki Oikawa, Saburo Takahashi, Takahito Ono and Eiji Saitoh
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Hiroki Arisawa: Institute for Materials Research, Tohoku University
Hang Shim: Tohoku University
Shunsuke Daimon: The University of Tokyo
Takashi Kikkawa: Institute for Materials Research, Tohoku University
Yasuyuki Oikawa: WPI, Advanced Institute for Materials Research, Tohoku University
Saburo Takahashi: WPI, Advanced Institute for Materials Research, Tohoku University
Takahito Ono: Tohoku University
Eiji Saitoh: Institute for Materials Research, Tohoku University

Nature Communications, 2022, vol. 13, issue 1, 1-6

Abstract: Abstract The interplay among magnetization and deformation of solids has long been an important issue in magnetism, the elucidation of which has made great progress in material physics. Controlling volume and shapes of matter is now indispensable to realizing various actuators for precision machinery and nanotechnology. Here, we show that the volume of a solid can be manipulated by injecting a spin current: a spin current volume effect (SVE). By using a magnet Tb0.3Dy0.7Fe2 exhibiting strong spin-lattice coupling, we demonstrate that the sample volume changes in response to a spin current injected by spin Hall effects. Theoretical calculation reflecting spin-current induced modulation of magnetization fluctuation well reproduces the experimental results. The SVE expands the scope of spintronics into making mechanical drivers.

Date: 2022
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DOI: 10.1038/s41467-022-30115-y

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