表面弾性波を用いた強磁性共鳴の励起

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: 2017/07/01

タイトル(英語): Excitation of Ferromagnetic Resonance using Surface Acoustic Waves

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

著者名(英語): Yukio Nozaki (Dept. of Phys., Faculty of Science and Technology, Keio University), Shogo Yanagisawa (Dept. of Phys., Faculty of Science and Technology, Keio University)

キーワード: 表面弾性波，磁歪，磁化ダイナミクス　　surface acoustic wave，magnetostriction，magnetization dynamics

要約(英語): Mechanical rotation of a crystal lattice in ferromagnetic materials can be energetically coupled with its magnetization via magnetoelastic coupling or spin rotation coupling. Surface acoustic wave (SAW) in piezoelectric materials is one of the promising candidates to realize the mechanical excitation of magnetization dynamics. In order to understand the mechanical rotation induced magnetization dynamics quantitatively, we examined the ferromagnetic resonance in a Ni film using a SAW in a LiNbO3 substrate. By decreasing a period of interdigital transducer as short as 4 μm which is one-fifth of the previous work by Weiler [M. Weiler et al., Phys. Rev. Lett. 106, 117601 (2011)], the fundamental frequency of SAW could be higher than 800 MHz. From the dependence of microwave absorption on the angle between the magnetization and the wave vector of SAW, it was confirmed that the Rayleigh type SAW, which was significant to obtain a large mechanical coupling with the magnetization, was dominantly excited in the 800-MHz-SAW device.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.137 No.7 （2017） 特集：平成28年基礎・材料・共通部門大会－テーマ付きセッション：ナノ磁性体の物性と機能性－

本誌掲載ページ: 386-391 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/137/7/137_386/_article/-char/ja/