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Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

1
School of Science and Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology, Wuhan 430205, China
2
Department of Physics, Ewha Womans University, Seoul 03760, Korea
*
Authors to whom correspondence should be addressed.
Crystals 2019, 9(7), 357; https://doi.org/10.3390/cryst9070357
Received: 30 May 2019 / Revised: 9 July 2019 / Accepted: 10 July 2019 / Published: 14 July 2019
(This article belongs to the Special Issue Raman Spectroscopy of Crystals)
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PDF [1939 KB, uploaded 15 July 2019]
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Abstract

Magnonics, an emerging research field, aims to control and manipulate spin waves in magnetic materials and structures. However, the current understanding of spin waves remains quite limited. This review attempts to provide an overview of the anomalous behaviors of spin waves in various types of magnetic materials observed thus far by inelastic light scattering experiments. The anomalously large asymmetry of anti-Stokes to Stokes intensity ratio, broad linewidth, strong resonance effect, unique polarization selection, and abnormal impurity dependence of spin waves are discussed. In addition, the mechanisms of these anomalous behaviors of spin waves are proposed. View Full-Text
Keywords: spin wave; anti-Stokes; linewidth; resonance; polarization; magnonic crystal spin wave; anti-Stokes; linewidth; resonance; polarization; magnonic crystal
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Hou, H.-Y.; Yang, M.; Qiu, J.; Yang, I.-S.; Chen, X.-B. Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering. Crystals 2019, 9, 357.

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