Unconventional scaling and significant enhancement of the spin Seebeck effect in multilayers
Unconventional scaling and significant enhancement of the spin Seebeck effect in multilayers
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DOI：
10.1103/physrevb.92.220407
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发表时间：
2015-12
影响因子：
3.7
通讯作者：
R. Ramos;T. Kikkawa;M. Aguirre;I. Lucas;A. Anadón;T. Oyake;K. Uchida;H. Adachi;J. Shiomi;P. Algarabel;L. Morellón;S. Maekawa;E. Saitoh;M. Ibarra
中科院分区：
文献类型：
--
作者：
R. Ramos;T. Kikkawa;M. Aguirre;I. Lucas;A. Anadón;T. Oyake;K. Uchida;H. Adachi;J. Shiomi;P. Algarabel;L. Morellón;S. Maekawa;E. Saitoh;M. Ibarra
热自旋泵构成了一种新的机制产生的自旋电流，但他们的弱强度构成了一个主要的障碍，其实用性。我们报告的现象，产生一个巨大的自旋电流的多层系统的中心区域，导致在一个巨大的自旋塞贝克效应的结构中形成的铁磁/金属双层重复。其结果是在多个界面的磁振子和电子自旋电流的相互转换的后果。这项工作开辟了可能性，设计薄膜异质结，可能会推动自旋电子学中的热自旋电流的应用。
Thermal spin pumping constitutes a novel mechanism for generation of spin currents; however their weak intensity constitutes a major roadblock for its usefulness. We report a phenomenon that produces a huge spin current in the central region of a multilayer system, resulting in a giant spin Seebeck effect in a structure formed by repetition of ferromagnet/metal bilayers. The result is a consequence of the interconversion of magnon and electron spin currents at the multiple interfaces. This work opens the possibility to design thin film heterostructures that may boost the application of thermal spin currents in spintronics.