Linewidth broadening of optical precession mode in synthetic antiferromagnet

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

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


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 languageEnglish
Article number063010
JournalApplied Physics Express
Issue number6
Publication statusPublished - 2014 Jun


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