Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet |
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Authors: | Costache M V Sladkov M Watts S M van der Wal C H van Wees B J |
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Institution: | Physics of Nanodevices Group, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands. |
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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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