Pressure dependence of far-infrared reflectance spectra in layered iron oxide LuFe2O4

T. Go; H. Okamura; G. Oohata; T. Nagata; T. Moriwaki; Y. Ikemoto; S. Mori; N. Ikeda; K. Mizoguchi

doi:10.14723/tmrsj.41.109

Regular Papers

Pressure dependence of far-infrared reflectance spectra in layered iron oxide LuFe₂O₄

T. Go, H. Okamura, G. Oohata, T. Nagata, T. Moriwaki, Y. Ikemoto, S. Mori, N. Ikeda, K. Mizoguchi

Author information

T. Go
Department of Physical Science, Graduate School of Science, Osaka Prefecture University
H. Okamura
Department of Physics, Graduate School of Science, Kobe University
present address : Department of Chemical Science and Technology, The University of Tokushima
G. Oohata
Department of Physical Science, Graduate School of Science, Osaka Prefecture University
T. Nagata
College of science and technology, Nihon University
T. Moriwaki
SPring-8, Japan Synchrotron Radiation Research Institute (JASRI)
Y. Ikemoto
SPring-8, Japan Synchrotron Radiation Research Institute (JASRI)
S. Mori
Department of Materials Science, Osaka Prefecture University
N. Ikeda
Department of Physics, Faculty of Science, Okayama University
K. Mizoguchi
Department of Physical Science, Graduate School of Science, Osaka Prefecture University

Keywords: far-infrared, high pressure, electronic ferroelectric material, electron-phonon interaction, LuFe₂O₄

JOURNAL FREE ACCESS

2016 Volume 41 Issue 1 Pages 109-112

DOI https://doi.org/10.14723/tmrsj.41.109

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Abstract

The far-infrared reflectance spectra of layered iron oxide LuFe₂O₄ have been investigated at external pressure up to 8 GPa. The observed phonon modes continuously shift to the higher energy side with increasing pressure below 6 GPa. However, it is found that the spectral profile of the phonon modes drastically changes around 6 GPa. From the analysis of the phonon modes using a Lorentz oscillator model, it is shown that the spectral changes correspond to a structural phase transition that occurs at 6 GPa.

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