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

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

2010-06-24

arxiv.org/abs/1006.4676v1

Physics

Condensed Matter

Materials Science

Scientific paper

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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