The inverse spin-Hall effect (ISHE) induced by the spin pumping has been investigated systematically in simple ferromagnetic/paramagnetic bilayer systems. The spin pumping driven by ferromagnetic resonance injects a spin current into the paramagnetic layer, which gives rise to an electromotive force transverse to the spin current using the ISHE in the paramagnetic layer. In a film, we found an electromotive force perpendicular to the applied magnetic field at the ferromagnetic resonance condition. The spectral shape of the electromotive force is well reproduced using a simple Lorentz function, indicating that the electromotive force is due to the ISHE induced by the spin pumping; extrinsic magnetogalvanic effects are eliminated in this measurement. The electromotive force varies systematically by changing the microwave power, magnetic-field angle, and film size, being consistent with the prediction based on the Landau–Lifshitz–Gilbert equation combined with the models of the ISHE and spin pumping. The electromotive force was observed also in a film, in which the metallic layer is replaced by an insulating layer, supporting that the spin-pumping-induced ISHE is responsible for the observed electromotive force.
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15 May 2011
Research Article|
May 23 2011
Inverse spin-Hall effect induced by spin pumping in metallic system
K. Ando;
K. Ando
a)
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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S. Takahashi;
S. Takahashi
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
2CREST, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075,
Japan
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J. Ieda;
J. Ieda
2CREST, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075,
Japan
3The Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195,
Japan
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Y. Kajiwara;
Y. Kajiwara
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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H. Nakayama;
H. Nakayama
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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T. Yoshino;
T. Yoshino
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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K. Harii;
K. Harii
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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Y. Fujikawa;
Y. Fujikawa
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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M. Matsuo;
M. Matsuo
3The Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195,
Japan
4Yukawa Institute for Theoretical Physics,
Kyoto University
, Kyoto 606-8502
, Japan
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S. Maekawa;
S. Maekawa
2CREST, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075,
Japan
3The Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195,
Japan
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E. Saitoh
E. Saitoh
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
2CREST, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075,
Japan
3The Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195,
Japan
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
J. Appl. Phys. 109, 103913 (2011)
Article history
Received:
December 24 2010
Accepted:
April 04 2011
Citation
K. Ando, S. Takahashi, J. Ieda, Y. Kajiwara, H. Nakayama, T. Yoshino, K. Harii, Y. Fujikawa, M. Matsuo, S. Maekawa, E. Saitoh; Inverse spin-Hall effect induced by spin pumping in metallic system. J. Appl. Phys. 15 May 2011; 109 (10): 103913. https://doi.org/10.1063/1.3587173
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