Tunable Damping in Magnetic Nanowires Induced by Chiral Pumping of Spin Waves
| Autor: | Chenyang Guo, Song Liu, Lutong Sheng, Dapeng Yu, Wenqing He, Yu Zhang, Qiuming Song, Hanchen Wang, Hao Jia, Xiufeng Han, Mingkun Zhao, Gianluca Gubbiotti, Jilei Chen, Haiming Yu, Marco Madami |
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| Rok vydání: | 2021 |
| Předmět: |
Spin pumping
Materials science Condensed matter physics Magnon General Engineering Nanowire Physics::Optics General Physics and Astronomy Grating spin waves Light scattering chiral pumping line width broadening nanomagnonics Condensed Matter::Materials Science Magnetization Spin wave magnetic damping Magnetic damping Condensed Matter::Strongly Correlated Electrons General Materials Science |
| Zdroj: | ACS Nano. 15:9076-9083 |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | Spin-current and spin-wave-based devices have been considered as promising candidates for next-generation information transport and processing and wave-based computing technologies with low-power consumption. Spin pumping has attracted tremendous attention and has led to interesting phenomena, including the line width broadening, which indicates damping enhancement due to energy dissipation. Recently, chiral spin pumping of spin waves has been experimentally realized and theoretically studied in magnetic nanostructures. Here, we experimentally observe by Brillouin light scattering (BLS) microscopy the line width broadening sensitive to magnetization configuration in a hybrid metal-insulator nanostructure consisting of a Co nanowire grating dipolarly coupled to a planar continuous YIG film, consistent with the results of the measured hysteresis loop. Tunable line width broadening has been confirmed independently by propagating spin-wave spectroscopy, where unidirectional spin waves are detected. Position-dependent BLS measurement unravels an oscillating-like behavior of magnon populations in Co nanowire grating, which might result from the magnon trap effect. These results are thus attractive for reconfigurable nanomagnonics devices. |
| Databáze: | OpenAIRE |
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