1. Spin wavepackets in the Kagome ferromagnet Fe3Sn2: Propagation and precursors.
- Author
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Changmin Lee, Yue Sun, Linda Ye, Rathi, Sumedh, Kevin Wang, Yuan-Ming Lu, Moore, Joel, Checkelsky, Joseph G., and Orenstein, Joseph
- Subjects
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SPIN waves , *FERROMAGNETIC materials , *WAVE packets , *GROUP velocity , *OPTICAL measurements - Abstract
The propagation of spin waves in magnetically ordered systems has emerged as a potential means to shuttle quantum information over large distances. Conventionally, the arrival time of a spin wavepacket at a distance, d, is assumed to be determined by its group velocity, vg. Here, we report time-resolved optical measurements of wavepacket propagation in the Kagome ferromagnet Fe3Sn2 that demonstrate the arrival of spin information at times significantly less than d=vg. We show that this spin wave "precursor" originates from the interaction of light with the unusual spectrum of magnetostatic modes in Fe3Sn2. Related effects may have far-reaching consequences toward realizing long-range, ultrafast spin wave transport in both ferromagnetic and antiferromagnetic systems. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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