Electron-phonon coupling in DyFeO3 revealed by infrared spectroscopy

2013/02/13 by A. D. LaForge, J. Whalen, LaForge, A. D. +9
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Multiferroics and related materials #X-ray Diffraction in Crystallography #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.1302.2989

5 pages, 5 figures

arxiv created 2013/02/13 · arxiv updated 2013/02/14

Abstract

We have investigated crystal field and phonon dynamics of the multiferroic orthoferrite DyFeO₃ via polarized infrared spectroscopy. Reflectance of single crystals was measured in the far- to mid-infrared spectral range at range of temperatures from 10-295 K. We observe a strongly anisotropic phonon spectrum which differs from earlier lattice dynamical calculations in its symmetry, as well as a mode with significant and unusual temperature dependence that we interpret as a coupled phonon-crystal-field excitation.

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