Spin pumping by higher-order dipole-exchange spin-wave modes

doi:10.1088/1674-1056/ac8922

中国物理B ›› 2023, Vol. 32 ›› Issue (3): 37601-037601.doi: 10.1088/1674-1056/ac8922

Spin pumping by higher-order dipole-exchange spin-wave modes

Peng Wang(王鹏)^1,2,†

1 College of Mathematics and Physics, Qingdao University of Science and Technology, Qingdao 266061, China;
2 Advanced Optoelectronic Materials and Technologies Engineering Laboratory of Shandong Province, Qingdao 266061, China

收稿日期:2022-06-07 修回日期:2022-07-28 接受日期:2022-08-12 出版日期:2023-02-14 发布日期:2023-02-21
通讯作者: Peng Wang E-mail:pwang7000@163.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11904194).

Spin pumping by higher-order dipole-exchange spin-wave modes

Peng Wang(王鹏)^1,2,†

1 College of Mathematics and Physics, Qingdao University of Science and Technology, Qingdao 266061, China;
2 Advanced Optoelectronic Materials and Technologies Engineering Laboratory of Shandong Province, Qingdao 266061, China

Received:2022-06-07 Revised:2022-07-28 Accepted:2022-08-12 Online:2023-02-14 Published:2023-02-21
Contact: Peng Wang E-mail:pwang7000@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11904194).

1. 附件.pdf(559KB)

摘要/Abstract

摘要： Spin pumping (SP) and inverse spin Hall effect (ISHE) driven by parametrically-excited dipole-exchange spin waves in a yttrium iron garnet film have been systematically investigated. The measured voltage spectrum exhibits a feature of the field-induced transition from parallel pumping to perpendicular pumping because of the inhomogeneous excitation geometry. Thanks to the high precision of the SP-ISHE detection, two sets of fine structures in the voltage spectrum are observed, which can correspond well to two kinds of critical points in the multimode spin-wave spectrum for magnetic films. One is the q = 0 point of each higher-order dispersion branch, and the other is the local minimum due to the interplay between the dipolar and exchange interactions. These fine structures on the voltage spectrum confirm the spin pumping by higher-order dipole-exchange spin-wave modes, and are helpful for probing the multimode spin-wave spectrum.

关键词: spin pumping, parametric excitation, spin-wave spectrum, fine structures

Abstract: Spin pumping (SP) and inverse spin Hall effect (ISHE) driven by parametrically-excited dipole-exchange spin waves in a yttrium iron garnet film have been systematically investigated. The measured voltage spectrum exhibits a feature of the field-induced transition from parallel pumping to perpendicular pumping because of the inhomogeneous excitation geometry. Thanks to the high precision of the SP-ISHE detection, two sets of fine structures in the voltage spectrum are observed, which can correspond well to two kinds of critical points in the multimode spin-wave spectrum for magnetic films. One is the q = 0 point of each higher-order dispersion branch, and the other is the local minimum due to the interplay between the dipolar and exchange interactions. These fine structures on the voltage spectrum confirm the spin pumping by higher-order dipole-exchange spin-wave modes, and are helpful for probing the multimode spin-wave spectrum.

Key words: spin pumping, parametric excitation, spin-wave spectrum, fine structures

中图分类号: (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)

76.50.+g

75.40.Gb (Dynamic properties?) 75.30.Ds (Spin waves)

Peng Wang(王鹏). Spin pumping by higher-order dipole-exchange spin-wave modes[J]. 中国物理B, 2023, 32(3): 37601-037601.

Peng Wang(王鹏). Spin pumping by higher-order dipole-exchange spin-wave modes[J]. Chin. Phys. B, 2023, 32(3): 37601-037601.

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Spin pumping by higher-order dipole-exchange spin-wave modes

Spin pumping by higher-order dipole-exchange spin-wave modes

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