| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Mode Structures and Damping of Quantized Spin Waves in Ferromagnetic Nanowires |
| Qingwei Fu1, Yong Li2, Lina Chen1, Fusheng Ma2, Haotian Li1, Yongbing Xu3,4, Bo Liu5, Ronghua Liu1*, and Youwei Du1 |
1National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
2Jiangsu Key Laboratory of Opto-Electronic Technology, Center for Quantum Transport and Thermal Energy Science, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China
3York-Nanjing Joint Center (YNJC) for Spintronics and Nanoengineering, School of Electronics Science and Engineering, Nanjing University, Nanjing 210093, China
4Spintronics and Nanodevice Laboratory, Department of Electronics, University of York, York YO10 5DD, United Kingdom
5Key Laboratory of Spintronics Materials, Devices and Systems of Zhejiang Province, Hangzhou 311300, China
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| Cite this article: |
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Qingwei Fu, Yong Li, Lina Chen et al 2020 Chin. Phys. Lett. 37 087503 |
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Abstract Magnonic devices based on spin waves are considered as a new generation of energy-efficient and high-speed devices for storage and processing of information. Here we experimentally demonstrate that three distinct dominated magneto-dynamic modes are excited simultaneously and coexist in a transversely magnetized ferromagnetic wire by the ferromagnetic resonance (FMR) technique. Besides the uniform FMR mode, the spin-wave well mode, the backward volume magnetostatic spin-wave mode, and the perpendicular standing spin-wave mode are experimentally observed and further confirmed with more detailed spatial profiles by micromagnetic simulation. Furthermore, our experimental approach can also access and reveal damping coefficients of these spin-wave modes, which provides essential information for development of magnonic devices in the future.
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Received: 25 April 2020
Published: 28 July 2020
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| PACS: |
75.40.Gb
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(Dynamic properties?)
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75.47.-m
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(Magnetotransport phenomena; materials for magnetotransport)
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75.78.-n
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(Magnetization dynamics)
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75.78.Cd
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(Micromagnetic simulations ?)
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| Fund: Supported by the National Key Research and Development Program of China (Grant No. 2016YFA0300803), the Open Research Fund of Jiangsu Provincial Key Laboratory for Nanotechnology, the National Natural Science Foundation of China (Grant Nos. 11774150 and 11704191), and the Natural Science Foundation of Jiangsu Province (Grant Nos. BK20171026 and BK20170627). |
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