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. 2006 Nov 24;97(21):216603.
doi: 10.1103/PhysRevLett.97.216603. Epub 2006 Nov 22.

Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet

M V Costache  1 , M Sladkov, S M Watts, C H van der Wal, B J van Wees
Affiliations

Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet

M V Costache et al. Phys Rev Lett. .

Abstract

We report direct electrical detection of spin pumping, using a lateral normal-metal/ferromagnet/normal-metal device, where a single ferromagnet in ferromagnetic resonance pumps spin-polarized electrons into the normal metal, resulting in spin accumulation. The resulting backflow of spin current into the ferromagnet generates a dc voltage due to the spin-dependent conductivities of the ferromagnet. By comparing different contact materials (Al and/or Pt), we find, in agreement with theory, that the spin-related properties of the normal metal dictate the magnitude of the dc voltage.

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