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arXiv · 1006.4676

Magnetodielectric coupling of infrared phonons in single crystal Cu$_{2}$OSeO$_{3}$

K. H. Miller·X. S. Xu·H. Berger·E. S. Knowles·D. J. Arenas·M. W. Meisel·D. B. Tanner
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Abstract

Reflection and transmission as a function of temperature have been measured on a single crystal of the magnetoelectric ferrimagnetic compound Cu$_{2}$OSeO$_{3}$ utilizing light spanning the far infrared to the visible portions of the electromagnetic spectrum. The complex dielectric function and optical properties were obtained via Kramers-Kronig analysis and by fits to a Drude-Lortentz model. The fits of the infrared phonons show a magnetodielectric effect near the transition temperature ($T_{c}\sim 60$~K). Assignments to strong far infrared phonon modes have been made, especially those exhibiting anomalous behavior around the transition temperature.

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K. H. Miller, X. S. Xu, H. Berger, E. S. Knowles, D. J. Arenas, M. W. Meisel, D. B. Tanner. 2010-06-24. Magnetodielectric coupling of infrared phonons in single crystal Cu$_{2}$OSeO$_{3}$. https://doi.org/10.1103/physrevb.82.144107

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