Enhancement of the spin pumping efficiency by spin wave mode selection

C. W. Sandweg; Y. Kajiwara; K. Ando; E. Saitoh; B. Hillebrands

doi:10.1063/1.3528207

Enhancement of the spin pumping efficiency by spin wave mode selection

C. W. Sandweg, Y. Kajiwara, K. Ando, E. Saitoh, B. Hillebrands

Advanced Institute for Materials Research (AIMR)

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

131 Citations (Scopus)

Abstract

The spin pumping efficiency of standing spin wave modes in a rectangular Y₃ Fe₅ O₁₂ /Pt sample has been investigated by means of inverse spin-Hall effect (ISHE). Standing spin waves drive spin pumping, the generation of spin currents from magnetization precession, into the Pt layer which is converted into a detectable voltage due to the ISHE. We discovered that the spin pumping efficiency is significantly higher for standing surface spin waves, hybridized with thickness modes, rather than for volume spin wave modes. The results suggest that the use of higher-mode surface spin waves allows for the fabrication of an efficient spin-current injector.

Original language	English
Article number	252504
Journal	Applied Physics Letters
Volume	97
Issue number	25
DOIs	https://doi.org/10.1063/1.3528207
Publication status	Published - 2010 Dec 20

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3528207

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title = "Enhancement of the spin pumping efficiency by spin wave mode selection",

abstract = "The spin pumping efficiency of standing spin wave modes in a rectangular Y3 Fe5 O12 /Pt sample has been investigated by means of inverse spin-Hall effect (ISHE). Standing spin waves drive spin pumping, the generation of spin currents from magnetization precession, into the Pt layer which is converted into a detectable voltage due to the ISHE. We discovered that the spin pumping efficiency is significantly higher for standing surface spin waves, hybridized with thickness modes, rather than for volume spin wave modes. The results suggest that the use of higher-mode surface spin waves allows for the fabrication of an efficient spin-current injector.",

author = "Sandweg, {C. W.} and Y. Kajiwara and K. Ando and E. Saitoh and B. Hillebrands",

note = "Funding Information: The authors thank A. A. Serga, A. V. Chumak, and M. P. Kostylev for valuable discussions. This work was supported by the DFG within the SFB/Transregio 49 “Condensed Matter Systems with Variable Many-Body Interactions,” by a Grant-in-Aid for Scientific Research Priority Area “Creation and control of spin current” (Grant Nos. 19048009 and 19048028), a Grant-in-Aid for Scientific Research (A), the global COE for the “Materials integration international center of education and research” all from MEXT, Japan, and a Grant for Industrial Technology Research from NEDO, Japan.",

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AU - Sandweg, C. W.

AU - Kajiwara, Y.

AU - Ando, K.

AU - Saitoh, E.

AU - Hillebrands, B.

N1 - Funding Information: The authors thank A. A. Serga, A. V. Chumak, and M. P. Kostylev for valuable discussions. This work was supported by the DFG within the SFB/Transregio 49 “Condensed Matter Systems with Variable Many-Body Interactions,” by a Grant-in-Aid for Scientific Research Priority Area “Creation and control of spin current” (Grant Nos. 19048009 and 19048028), a Grant-in-Aid for Scientific Research (A), the global COE for the “Materials integration international center of education and research” all from MEXT, Japan, and a Grant for Industrial Technology Research from NEDO, Japan.

PY - 2010/12/20

Y1 - 2010/12/20

N2 - The spin pumping efficiency of standing spin wave modes in a rectangular Y3 Fe5 O12 /Pt sample has been investigated by means of inverse spin-Hall effect (ISHE). Standing spin waves drive spin pumping, the generation of spin currents from magnetization precession, into the Pt layer which is converted into a detectable voltage due to the ISHE. We discovered that the spin pumping efficiency is significantly higher for standing surface spin waves, hybridized with thickness modes, rather than for volume spin wave modes. The results suggest that the use of higher-mode surface spin waves allows for the fabrication of an efficient spin-current injector.

AB - The spin pumping efficiency of standing spin wave modes in a rectangular Y3 Fe5 O12 /Pt sample has been investigated by means of inverse spin-Hall effect (ISHE). Standing spin waves drive spin pumping, the generation of spin currents from magnetization precession, into the Pt layer which is converted into a detectable voltage due to the ISHE. We discovered that the spin pumping efficiency is significantly higher for standing surface spin waves, hybridized with thickness modes, rather than for volume spin wave modes. The results suggest that the use of higher-mode surface spin waves allows for the fabrication of an efficient spin-current injector.

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Enhancement of the spin pumping efficiency by spin wave mode selection

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