Journal
PHYSICAL REVIEW B
Volume 103, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.103.214407
Keywords
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Funding
- National Natural Science Foundation of China [11904260]
- Natural Science Foundation of Tianjin [20JCQNJC02020]
- Startup Fund of Tianjin University
- JSPS Kakenhi [20K14369]
- Science and Technology Commission of Shanghai Municipality [20JC1415900]
- Shanghai Municipal Science and Technology Major Project [2019SHZDZX01]
- Grants-in-Aid for Scientific Research [20K14369] Funding Source: KAKEN
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Spin wave, a fundamental angular momentum carrier in magnetic systems, propagates across chiral domain walls following simple geometric trajectories similar to geometric optics. Geometric behaviors are qualitatively different in normally magnetized films and tangentially magnetized films. Scattering phenomena become polarization dependent in antiferromagnets, indicating the emergence of spin wave birefringence inside antiferromagnetic domain walls.
Spin wave, the collective excitation of magnetic order, is one of the fundamental angular momentum carriers in magnetic systems. Understanding the spin wave propagation in magnetic textures lies in the heart of developing pure magnetic information processing schemes. Here we show that the spin wave propagation across a chiral domain wall follows simple geometric trajectories, similar to the geometric optics. And the geometric behaviors are qualitatively different in normally magnetized film and tangentially magnetized film. We identify the lateral shift, refraction, and total reflection of spin wave across a ferromagnetic domain wall. Moreover, these geometric scattering phenomena become polarization dependent in antiferromagnets, indicating the emergence of spin wave birefringence inside antiferromagnetic domain walls.
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