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Thermal imaging of standing spin waves

An, Toshu*; Yamaguchi, Kazuya*; Uchida, Kenichi*; Saito, Eiji

A simple method for the spatial imaging of standing spin-wave modes is demonstrated. We observed instantaneous temperature-rise images on a polycrystalline ferrimagnetic insulator Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$ slab using an infrared camera immediately after exciting magnetostatic standing spin-wave modes. Wefound that a wavy temperature distribution appears before the temperature distribution on the sample is smoothed by heat conduction. The distribution is consistent with the result of a calculation based on the Landau-Lifshitz-Gilbert equation using the effective demagnetization coefficient of the slab. This result proves that the method can image the spatially distributed patterns of standing spin waves.

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Category:Physics, Applied

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