Spin-relaxation modulation and spin-pumping control by transverse spin-wave spin current in Y3Fe5O12

Y. Kajiwara; K. Uchida; D. Kikuchi; T. An; Y. Fujikawa; E. Saitoh

doi:10.1063/1.4817076

Spin-relaxation modulation and spin-pumping control by transverse spin-wave spin current in Y₃Fe₅O₁₂

Y. Kajiwara, K. Uchida, D. Kikuchi, T. An, Y. Fujikawa, E. Saitoh

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Heat-current-induced manipulation of spin relaxation in Y ₃Fe₅O₁₂ under an in-plane temperature gradient is investigated. We show that the linewidth of the ferromagnetic resonance spectrum, i.e., the spin relaxation, in an Y₃Fe₅O ₁₂ film increases or decreases depending on the temperature-gradient direction and that this modulation is attributed to the spin-transfer torque caused by a thermally induced transverse spin-wave spin current in the Y ₃Fe₅O₁₂ film. The experimental results also show that the spin-current magnitude generated by spin pumping in an attached Pt film is inversely proportional to the square of the modulated Gilbert damping constant, consistent with a phenomenological spin-pumping model.

Original language	English
Article number	052404
Journal	Applied Physics Letters
Volume	103
Issue number	5
DOIs	https://doi.org/10.1063/1.4817076
Publication status	Published - 2013 Jul 29

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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@article{8141a7ec72094b2586e40d43ffa523ed,

title = "Spin-relaxation modulation and spin-pumping control by transverse spin-wave spin current in Y3Fe5O12",

abstract = "Heat-current-induced manipulation of spin relaxation in Y 3Fe5O12 under an in-plane temperature gradient is investigated. We show that the linewidth of the ferromagnetic resonance spectrum, i.e., the spin relaxation, in an Y3Fe5O 12 film increases or decreases depending on the temperature-gradient direction and that this modulation is attributed to the spin-transfer torque caused by a thermally induced transverse spin-wave spin current in the Y 3Fe5O12 film. The experimental results also show that the spin-current magnitude generated by spin pumping in an attached Pt film is inversely proportional to the square of the modulated Gilbert damping constant, consistent with a phenomenological spin-pumping model.",

author = "Y. Kajiwara and K. Uchida and D. Kikuchi and T. An and Y. Fujikawa and E. Saitoh",

note = "Funding Information: The authors thank S. Maekawa, H. Adachi, J. Ohe, B. Hillebrands, and S. M. Rezende for valuable discussions. This work was supported by a Grant-in-Aid for JSPS Fellows from JSPS, Japan, a Grant-in-Aid for Young Scientists (A) (25707029) from MEXT, Japan, a Grant-in-Aid for Scientific Research (A) (24244051) from MEXT, Japan, PRESTO-JST “Phase Interfaces for Highly Efficient Energy Utilization,” CREST-JST “Creation of Nanosystems with Novel Functions through Process Integration,” LC-IMR of Tohoku University, The Murata Science Foundation, The Mazda Foundation, and The Sumitomo Foundation. ",

year = "2013",

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doi = "10.1063/1.4817076",

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T1 - Spin-relaxation modulation and spin-pumping control by transverse spin-wave spin current in Y3Fe5O12

AU - Kajiwara, Y.

AU - Uchida, K.

AU - Kikuchi, D.

AU - An, T.

AU - Fujikawa, Y.

AU - Saitoh, E.

N1 - Funding Information: The authors thank S. Maekawa, H. Adachi, J. Ohe, B. Hillebrands, and S. M. Rezende for valuable discussions. This work was supported by a Grant-in-Aid for JSPS Fellows from JSPS, Japan, a Grant-in-Aid for Young Scientists (A) (25707029) from MEXT, Japan, a Grant-in-Aid for Scientific Research (A) (24244051) from MEXT, Japan, PRESTO-JST “Phase Interfaces for Highly Efficient Energy Utilization,” CREST-JST “Creation of Nanosystems with Novel Functions through Process Integration,” LC-IMR of Tohoku University, The Murata Science Foundation, The Mazda Foundation, and The Sumitomo Foundation.

PY - 2013/7/29

Y1 - 2013/7/29

N2 - Heat-current-induced manipulation of spin relaxation in Y 3Fe5O12 under an in-plane temperature gradient is investigated. We show that the linewidth of the ferromagnetic resonance spectrum, i.e., the spin relaxation, in an Y3Fe5O 12 film increases or decreases depending on the temperature-gradient direction and that this modulation is attributed to the spin-transfer torque caused by a thermally induced transverse spin-wave spin current in the Y 3Fe5O12 film. The experimental results also show that the spin-current magnitude generated by spin pumping in an attached Pt film is inversely proportional to the square of the modulated Gilbert damping constant, consistent with a phenomenological spin-pumping model.

AB - Heat-current-induced manipulation of spin relaxation in Y 3Fe5O12 under an in-plane temperature gradient is investigated. We show that the linewidth of the ferromagnetic resonance spectrum, i.e., the spin relaxation, in an Y3Fe5O 12 film increases or decreases depending on the temperature-gradient direction and that this modulation is attributed to the spin-transfer torque caused by a thermally induced transverse spin-wave spin current in the Y 3Fe5O12 film. The experimental results also show that the spin-current magnitude generated by spin pumping in an attached Pt film is inversely proportional to the square of the modulated Gilbert damping constant, consistent with a phenomenological spin-pumping model.

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