非線形磁化ダイナミクスの定量評価法

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2021/02/01

タイトル(英語): Experimental Method for Quantitative Evaluation of Nonlinear Magnetization Dynamics

著者名: 岡野　元基（慶應義塾大学理工学部物理学科），能崎　幸雄（慶應義塾大学理工学部物理学科）

著者名(英語): Genki Okano (Department of Physics, Keio University), Yukio Nozaki (Department of Physics, Keio University)

キーワード: 強磁性共鳴，非線形ダイナミクス，マイクロ波アシスト磁化反転_x000D_　　ferromagnetic resonance，nonlinear dynamics，microwave-assisted magnetization switching

要約(英語): We have developed an experimental technique to investigate a nonlinear magnetization dynamics resonantly excited by strong microwave fields. In this technique, a magnetization switching was observed when a sub-nanosecond wide pulsed field was applied to the ferromagnetic resonance-excited ferromagnets. Such a cooperative switching with simultaneous application of microwave- and pulsed-fields can evaluate an effective energy barrier for magnetization switching in various nonlinear magnetization dynamics. In this review, we show the experimental results on (1) the temporal evolution of the energy barrier in the transient of magnetization precession growth and (2) the observation of saddle-node bifurcation in the microwave-excited nonlinear magnetization dynamics.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.141 No.2 （2021） 特集：ナノスケール磁性体の構造・組織解析と創製に関する動向と展望

本誌掲載ページ: 99-104 p

原稿種別: 解説論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/141/2/141_99/_article/-char/ja/