Spin Seebeck mechanical force
Spin Seebeck mechanical force
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DOI：
10.1038/s41467-019-10625-y
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发表时间：
2019-06
影响因子：
16.6
通讯作者：
K. Harii;Y. Seo;Y. Tsutsumi;H. Chudo;K. Oyanagi;M. Matsuo;Y. Shiomi;T. Ono;S. Maekawa;E. Saitoh
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文献类型：
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作者：
K. Harii;Y. Seo;Y. Tsutsumi;H. Chudo;K. Oyanagi;M. Matsuo;Y. Shiomi;T. Ono;S. Maekawa;E. Saitoh
电流已被用来把电送到很远的地方。另一方面，自旋流，一种电子自旋流，原则上也可以将角动量发送到遥远的地方。在磁铁中，有一种普遍的自旋载体，称为自旋波，一种磁化的波型激发。由于自旋波具有很长的传播长度，它应该能够发送角动量，从而在远处产生扭矩和力：这是磁体的一个新功能。在这里，我们观察到的机械角动量传输和力的产生，由于自旋波注入到Y3Fe5O12的自旋Seebeck效应。自旋波电流通过Y3Fe5O12微悬臂梁传输，在悬臂梁上产生一个机械力，作为自旋Seebeck效应的非局域反应.自旋波电流即使在开路情况下也可以远程产生，并可用于驱动微机械器件。
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 Y3Fe5O12by the spin-Seebeck effect. The spin-wave current, transmitted through a Y3Fe5O12micro 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.