TY - JOUR
T1 - Inverse spin-Hall effect induced by spin pumping in metallic system
AU - Ando, K.
AU - Takahashi, S.
AU - Ieda, J.
AU - Kajiwara, Y.
AU - Nakayama, H.
AU - Yoshino, T.
AU - Harii, K.
AU - Fujikawa, Y.
AU - Matsuo, M.
AU - Maekawa, S.
AU - Saitoh, E.
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research in Priority Area “Creation and control of spin current” (Grant Nos. 19048028, 19048009) from MEXT, Japan, a Grant-in-Aid for Scientific Research (A) (21244058) from MEXT, Japan, a Grant-in-Aid for Research Activity Start-up (2284005) from MEXT, Japan, a Strategic Information and Communications R&D Promotion Program from MIC (102102001), Japan, the Sumitomo Foundation, Japan, a Grant for Industrial Technology Research from NEDO, Japan, Fundamental Research Grant from TRF, Japan, and the Next Generation Supercomputing Project of Nanoscience Program from IMS, Japan.
PY - 2011/5/15
Y1 - 2011/5/15
N2 - 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 Ni81 Fe 19/ Pt 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 Pt / Y 3 Fe 4 GaO 12 film, in which the metallic Ni 81 Fe 19 layer is replaced by an insulating Y 3 Fe 4 GaO 12 layer, supporting that the spin-pumping-induced ISHE is responsible for the observed electromotive force.
AB - 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 Ni81 Fe 19/ Pt 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 Pt / Y 3 Fe 4 GaO 12 film, in which the metallic Ni 81 Fe 19 layer is replaced by an insulating Y 3 Fe 4 GaO 12 layer, supporting that the spin-pumping-induced ISHE is responsible for the observed electromotive force.
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U2 - 10.1063/1.3587173
DO - 10.1063/1.3587173
M3 - Article
AN - SCOPUS:79958819719
SN - 0021-8979
VL - 109
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 10
M1 - 103913
ER -