Gilbert damping in the layered antiferromagnet CrCl3

doi:10.1088/1674-1056/ac11cc

中国物理B ›› 2022, Vol. 31 ›› Issue (2): 27505-027505.doi: 10.1088/1674-1056/ac11cc

Gilbert damping in the layered antiferromagnet CrCl₃

Xinlin Mi(米锌林), Ledong Wang(王乐栋), Qi Zhang(张琪), Yitong Sun(孙艺彤), Yufeng Tian(田玉峰), Shishen Yan(颜世申), and Lihui Bai(柏利慧)^†

School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China

收稿日期:2021-05-14 修回日期:2021-06-24 接受日期:2021-07-07 出版日期:2022-01-13 发布日期:2022-01-22
通讯作者: Lihui Bai E-mail:lhbai@sdu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11774200), the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2019JQ02), and the Youth Interdisciplinary Science and Innovative Research Groups of Shandong University.

Gilbert damping in the layered antiferromagnet CrCl₃

Xinlin Mi(米锌林), Ledong Wang(王乐栋), Qi Zhang(张琪), Yitong Sun(孙艺彤), Yufeng Tian(田玉峰), Shishen Yan(颜世申), and Lihui Bai(柏利慧)^†

School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China

Received:2021-05-14 Revised:2021-06-24 Accepted:2021-07-07 Online:2022-01-13 Published:2022-01-22
Contact: Lihui Bai E-mail:lhbai@sdu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11774200), the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2019JQ02), and the Youth Interdisciplinary Science and Innovative Research Groups of Shandong University.

摘要/Abstract

摘要： We theoretically and experimentally studied the Gilbert damping evolution of both acoustic and optical magnetic resonance modes in the layered flake CrCl₃ with an external magnetic field H applied in plane. Based on a Lagrangian equation and a Rayleigh dissipation function, we predicted that the resonance linewidth ΔH as a function of microwave frequency ω is nonlinear for both acoustic and optical modes in the CrCl₃ flake, which is significantly different from the linear relationship of ΔH ∝ ω in ferromagnets. Measuring the microwave transmission through the CrCl₃ flake, we obtained the ω-H dispersion and damping evolution ΔH-ω for both acoustic and optical modes. Combining both our theoretical prediction and experimental observations, we concluded that the nonlinear damping evolution ΔH-ω is a consequence of the interlayer interaction during the antiferromagnetic resonance, and the interlayer Gilbert dissipation plays an important role in the nonlinear damping evolution because of the asymmetry of the non-collinear magnetizaiton between layers.

关键词: Gilbert damping, antiferromagnetic resonance (AFMR), CrCl₃

Abstract: We theoretically and experimentally studied the Gilbert damping evolution of both acoustic and optical magnetic resonance modes in the layered flake CrCl₃ with an external magnetic field H applied in plane. Based on a Lagrangian equation and a Rayleigh dissipation function, we predicted that the resonance linewidth ΔH as a function of microwave frequency ω is nonlinear for both acoustic and optical modes in the CrCl₃ flake, which is significantly different from the linear relationship of ΔH ∝ ω in ferromagnets. Measuring the microwave transmission through the CrCl₃ flake, we obtained the ω-H dispersion and damping evolution ΔH-ω for both acoustic and optical modes. Combining both our theoretical prediction and experimental observations, we concluded that the nonlinear damping evolution ΔH-ω is a consequence of the interlayer interaction during the antiferromagnetic resonance, and the interlayer Gilbert dissipation plays an important role in the nonlinear damping evolution because of the asymmetry of the non-collinear magnetizaiton between layers.

Key words: Gilbert damping, antiferromagnetic resonance (AFMR), CrCl₃

中图分类号: (Magnetization dynamics)

75.78.-n

76.50.+g (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance) 75.50.Ee (Antiferromagnetics)

Xinlin Mi(米锌林), Ledong Wang(王乐栋), Qi Zhang(张琪), Yitong Sun(孙艺彤), Yufeng Tian(田玉峰), Shishen Yan(颜世申), and Lihui Bai(柏利慧). Gilbert damping in the layered antiferromagnet CrCl₃[J]. 中国物理B, 2022, 31(2): 27505-027505.

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Gilbert damping in the layered antiferromagnet CrCl₃

Gilbert damping in the layered antiferromagnet CrCl₃

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