| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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 |
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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.
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Received: 07 June 2022
Revised: 28 July 2022
Accepted manuscript online: 12 August 2022
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PACS:
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76.50.+g
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(Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)
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75.40.Gb
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(Dynamic properties?)
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75.30.Ds
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(Spin waves)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11904194). |
Corresponding Authors:
Peng Wang
E-mail: pwang7000@163.com
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Cite this article:
Peng Wang(王鹏) Spin pumping by higher-order dipole-exchange spin-wave modes 2023 Chin. Phys. B 32 037601
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