Spin current injection from sputtered yttrium iron garnet (YIG) films into an adjacent platinum layer has been investigated by means of the spin pumping and the spin Seebeck effects. Films with a thickness of 83 and 96 nanometers were fabricated by on-axis magnetron rf sputtering at room temperature and subsequent post-annealing. From the frequency dependence of the ferromagnetic resonance linewidth, the damping constant has been estimated to be (7.0 ± 1.0) × 10−4. Magnitudes of the spin current generated by the spin pumping and the spin Seebeck effect are of the same order as values for YIG films prepared by liquid phase epitaxy. The efficient spin current injection can be ascribed to a good YIG|Pt interface, which is confirmed by the large spin-mixing conductance (2.0 ± 0.2) × 1018 m−2.
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21 October 2014
Research Article|
October 15 2014
Spin current generation from sputtered Y3Fe5O12 films
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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Z. Qiu;
Z. Qiu
2WPI Advanced Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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T. Kikkawa;
T. Kikkawa
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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R. Iguchi;
R. Iguchi
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
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K. Uchida;
K. Uchida
1Institute for Materials Research,
Tohoku University
, Sendai 980-8577, Japan
3
PRESTO
, Japan Science and Technology Agency, Saitama 332-0012, 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
4
CREST
, Japan Science and Technology Agency, Tokyo 102-0076, Japan
5
Advanced Science Research Center
, Japan Atomic Energy Agency, Tokai 319-1195, Japan
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a)
Electronic mail: [email protected]
J. Appl. Phys. 116, 153902 (2014)
Article history
Received:
August 15 2014
Accepted:
October 03 2014
Citation
J. Lustikova, Y. Shiomi, Z. Qiu, T. Kikkawa, R. Iguchi, K. Uchida, E. Saitoh; Spin current generation from sputtered Y3Fe5O12 films. J. Appl. Phys. 21 October 2014; 116 (15): 153902. https://doi.org/10.1063/1.4898161
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