期刊
NATURE COMMUNICATIONS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms4768
关键词
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资金
- German research foundation (DFG) [SFB 689, SPP 1538]
- European Research Council (ERC) [280048 ECOMAGICS]
- Alexander von Humboldt foundation (AvH)
In spin electronics, the spin degree of freedom is used to transmit and store information. To this end the ability to create pure spin currents-that is, without net charge transfer-is essential. When the magnetization vector in a ferromagnet-normal metal junction is excited, the spin pumping effect leads to the injection of pure spin currents into the normal metal. The polarization of this spin current is time-dependent and contains a very small d.c. component. Here we show that the large a.c. component of the spin currents can be detected efficiently using the inverse spin Hall effect. The observed a.c.-inverse spin Hall voltages are one order of magnitude larger than the conventional d.c.-inverse spin Hall voltages measured on the same device. Our results demonstrate that ferromagnet-normal metal junctions are efficient sources of pure spin currents in the gigahertz frequency range.
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