Reflection and Refraction Process of Spinwave in a Ferromagnet/Frustrated Ferromagnet Junction System

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概要

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• Frustration introduces a nontrivial dispersion relation of spinwave even in a ferromagnetic phase in a spin system. We study the reflection and refraction process of spinwaves in the ferromagnet/frustrated ferromagnet junction system by using the Holstein--Primakoff spinwave expansion and taking the large-S limit. We discuss the relation between the incident angle and the refraction angle of spinwave, namely, the Snell's law of spinwave. As concrete examples of frustrated ferromagnets, we study the fully polarized ferromagnet phases in J_{1}--J_{2} chains and the J_{1}--J_{2} models on the square lattice. The interesting refraction processes, such as the splitting of the incident spinwave and the negative refraction, are discussed. We also study the transmittance and reflectance in these concrete models.

• 2013-07-15

著者

• Ueda Hiroaki

  Department Of Applied Chemistry And Department Of Advanced Materials Science University Of Tokyo:the

• Sasaki Yuta

  Department Of Physics Graduate School Of Science Tohoku University

• Ueda Hiroaki

  Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan

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