We report on the deformation of microwave absorption spectra and of the inverse spin Hall voltage signals in thin film bilayers of yttrium iron garnet (YIG) and platinum at high microwave power levels in a 9.45-GHz TE011 cavity. As the microwave power increases from 0.15 to 200 mW, the resonance field shifts to higher values, and the initially Lorentzian spectra of the microwave absorption intensity as well as the inverse spin Hall voltage signals become asymmetric. The contributions from opening of the magnetization precession cone and heating of YIG cannot well reproduce the data. Control measurements of inverse spin Hall voltages on thin-film YIG|Pt systems with a range of line widths underscore the role of spin-wave excitations in spectral deformation.
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21 February 2015
Research Article|
February 17 2015
Spectral shape deformation in inverse spin Hall voltage in Y3Fe5O12|Pt bilayers at high microwave power levels
J. Lustikova;
J. Lustikova
a)
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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Y. Shiomi;
Y. Shiomi
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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Y. Handa;
Y. Handa
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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E. Saitoh
E. Saitoh
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
2WPI Advanced Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
3CREST,
Japan Science and Technology Agency
, Tokyo 102-0076, Japan
4
Advanced Science Research Center
, Japan Atomic Energy Agency, Tokai 319-1195, Japan
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a)
Electronic mail: [email protected]
J. Appl. Phys. 117, 073901 (2015)
Article history
Received:
October 27 2014
Accepted:
February 04 2015
Citation
J. Lustikova, Y. Shiomi, Y. Handa, E. Saitoh; Spectral shape deformation in inverse spin Hall voltage in Y3Fe5O12|Pt bilayers at high microwave power levels. J. Appl. Phys. 21 February 2015; 117 (7): 073901. https://doi.org/10.1063/1.4908211
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