2021年第68回応用物理学会春季学術講演会

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10 スピントロニクス・マグネティクス » 10.2 スピン基盤技術・萌芽的デバイス技術

[17p-Z19-1~7] 10.2 スピン基盤技術・萌芽的デバイス技術

2021年3月17日(水) 13:15 〜 15:00 Z19 (Z19)

好田 誠(東北大)

13:15 〜 13:30

[17p-Z19-1] Control of magnon damping in ultrathin Co by introducing nonmagnetic buffer layers

〇(M1)Shugo Yoshii1、Ei Shigemastu1、Ryo Ohshima1、Yuichiro Ando1、Masashi Shiraishi1 (1.Department of Electronic Science and Engineering, Kyoto Univ.)

キーワード:magnon damping, ultra-thin ferromagnetic film, ferromagnetic metallic film

Low-magnon damping in ferromagnetic (FM) metals have been studied to achieve long-distance magnon transportation and strong coupling with photon in them. We realized the significant reduction of magnon damping in 1 nm-thick ultrathin Co by inserting Ta buffer beneath the ultrathin Co, which can expand possibilities in material choices for realizing strong magnon-photon coupling. One of the possible mechanisms to realize the reduction of the magnon damping in ultrathin Co is reduction of the in-plane magnetic anisotropy (IMA) field of Co by insertion of Ta. To study the correlation between magnon damping and IMA field in metallic bilayers, we focus on the other nonmagnets, Ti and Al, because Ti reduces IMA field in Co like Ta and, in contrast, Al shows small change of IMA field in Co.