Details

Autor(en) / Beteiligte

• Wei, Dahai
• Obstbaum, Martin
• Ribow, Mirko
• Back, Christian H
• Woltersdorf, Georg

Titel

Spin Hall voltages from a.c. and d.c. spin currents

Ist Teil von

• Nature communications, 2014-04, Vol.5 (1), p.3768-3768, Article 3768

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2014

Quelle

MEDLINE

Beschreibungen/Notizen

• 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.