Linewidth broadening of optical precession mode in synthetic antiferromagnet

Kensho Tanaka; Takahiro Moriyama; Masaki Nagata; Takeshi Seki; Koki Takanashi; Saburo Takahashi; Teruo Ono

doi:10.7567/APEX.7.063010

Linewidth broadening of optical precession mode in synthetic antiferromagnet

Kensho Tanaka, Takahiro Moriyama, Masaki Nagata, Takeshi Seki, Koki Takanashi, Saburo Takahashi, Teruo Ono

IMR - Materials Development Division

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

20 Citations (Scopus)

Abstract

We investigate the magnetization dynamics in synthetic antiferromagnetic (SyAFM) Fe/[Co/Cu]₁₀/Co/Pt multilayers using the microwave rectifying effect. We observe two distinct resonant modes in the dynamics. Numerical simulations reveal that the resonant modes can be attributed to acoustic and optical modes, which are the characteristic resonant modes of antiferromagnetically coupled materials. It is found that the linewidth of the optical mode is larger than that of the acoustic mode by a factor of 5. This broadening of the linewidth in the optical modes can be explained by the mutual spin pumping effect between the magnetizations precessing out of phase.

Original language	English
Article number	063010
Journal	Applied Physics Express
Volume	7
Issue number	6
DOIs	https://doi.org/10.7567/APEX.7.063010
Publication status	Published - 2014 Jun

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abstract = "We investigate the magnetization dynamics in synthetic antiferromagnetic (SyAFM) Fe/[Co/Cu]10/Co/Pt multilayers using the microwave rectifying effect. We observe two distinct resonant modes in the dynamics. Numerical simulations reveal that the resonant modes can be attributed to acoustic and optical modes, which are the characteristic resonant modes of antiferromagnetically coupled materials. It is found that the linewidth of the optical mode is larger than that of the acoustic mode by a factor of 5. This broadening of the linewidth in the optical modes can be explained by the mutual spin pumping effect between the magnetizations precessing out of phase.",

author = "Kensho Tanaka and Takahiro Moriyama and Masaki Nagata and Takeshi Seki and Koki Takanashi and Saburo Takahashi and Teruo Ono",

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AU - Tanaka, Kensho

AU - Moriyama, Takahiro

AU - Nagata, Masaki

AU - Seki, Takeshi

AU - Takanashi, Koki

AU - Takahashi, Saburo

AU - Ono, Teruo

PY - 2014/6

Y1 - 2014/6

N2 - We investigate the magnetization dynamics in synthetic antiferromagnetic (SyAFM) Fe/[Co/Cu]10/Co/Pt multilayers using the microwave rectifying effect. We observe two distinct resonant modes in the dynamics. Numerical simulations reveal that the resonant modes can be attributed to acoustic and optical modes, which are the characteristic resonant modes of antiferromagnetically coupled materials. It is found that the linewidth of the optical mode is larger than that of the acoustic mode by a factor of 5. This broadening of the linewidth in the optical modes can be explained by the mutual spin pumping effect between the magnetizations precessing out of phase.

AB - We investigate the magnetization dynamics in synthetic antiferromagnetic (SyAFM) Fe/[Co/Cu]10/Co/Pt multilayers using the microwave rectifying effect. We observe two distinct resonant modes in the dynamics. Numerical simulations reveal that the resonant modes can be attributed to acoustic and optical modes, which are the characteristic resonant modes of antiferromagnetically coupled materials. It is found that the linewidth of the optical mode is larger than that of the acoustic mode by a factor of 5. This broadening of the linewidth in the optical modes can be explained by the mutual spin pumping effect between the magnetizations precessing out of phase.

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Linewidth broadening of optical precession mode in synthetic antiferromagnet

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