Characterization of Coupling between Mechanical Angular Momentum and Electron Spin

机械角动量与电子自旋耦合的表征

• 批准号: 19J21720
• 负责人: 許 明然
• 金额: $ 1.98万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2019
• 资助国家: 日本
• 起止时间: 2019-04-25 至 2022-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-19J21720/
• 关键词: magneto-rotation; magnon-phonon coupling; mgneto-elastic coupling; non-reciprocity; Magnon; Phonon; Surface acoustic wave; Magnetoelastic wave; Spin wave; Nonreciprocity; Magneto-rotation; Suface acoustic waves

Microscopically, magnon-phonon coupling (MPC) is the force that correlates lattice and spin, i.e., associating magnetic energy. In recent, we observed a significant nonreciprocal behavior in MPC, which cannot be explained with conventional magneto-elastic coupling (MEC) based model, but can be fitted into the long time forgotten predication with magneto-rotation coupling (MRC). To further understand MRC and its connection with MEC, we performed a series MPC experiment on series NiFe alloys with modulated composition ratio. Systematic modulation of nonreciprocity has been observed. Besides, towards the application of MPC nonreciprocity, we designed and conduct a experiment with on a CoFeB(20 nm) thin film, where a magnetically controllable acoustic diode has been achieved.

从微观上讲，磁振子耦合（MPC）是关联晶格和自旋的力，即关联磁能。最近，我们观察到 MPC 中显着的不可逆行为，这无法用传统的磁弹性耦合（MEC）模型来解释，但可以用磁旋转耦合（MRC）拟合到长期被遗忘的预测中。为了进一步了解 MRC 及其与 MEC 的联系，我们对具有调制成分比的系列 NiFe 合金进行了一系列 MPC 实验。已经观察到非互易性的系统调节。此外，针对MPC非互易性的应用，我们在CoFeB(20 nm)薄膜上进行了设计和实验，实现了磁控声波二极管。

项目成果

Nonreciprocal surface acoustic wave propagation via magneto-rotation coupling

• DOI: 10.1126/sciadv.abb1724
• 发表时间: 2020-08-01
• 期刊: SCIENCE ADVANCES
• 影响因子: 13.6
• 作者: Xu, Mingran;Yamamoto, Kei;Otani, Yoshichika
• 通讯作者: Otani, Yoshichika

Inverse Edelstein Effect Induced by Magnon-Phonon Coupling.

磁振子-声子耦合引起的逆埃德尔斯坦效应。

• 发表时间: 2019
• 作者: Mingran Xu;Jorge Puebla;Florent Auvray;Bivas Rana;Kouta Kondou;and Yoshichika Otani
• 通讯作者: and Yoshichika Otani

A one-way street for sound waves

声波的单向街道

Interaction between surface acoustic waves and spin waves in a ferromagnetic thin film

铁磁薄膜中表面声波和自旋波之间的相互作用

• DOI: 10.1016/j.jmmm.2021.168672
• 发表时间: 2021
• 期刊: Journal of Magnetism and Magnetic Materials
• 影响因子: 2.7
• 作者: Kei Yamamoto ; Mingran Xu ; Jorge Puebla ; Yoshichika Otani ; Sadamichi Maekawa
• 通讯作者: Sadamichi Maekawa

. Nonreciprocal propagation of surface acoustic wave via magneto-rotation coupling.

。

• 发表时间: 2020
• 作者: Mingran Xu;Kei Yamamoto;Jorge Puebla;Korbinian Baumgaertl;Bivas Rana;Katsuya Miura;Hiromasa Takahashi;Dirk Grundler;Sadamichi Maekawa;Yoshichika Otani.
• 通讯作者: Yoshichika Otani.