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Ferroelectrics Volume 346, 2007 - Issue 1
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Original Articles

Deuteration-Induced Phase Transition in Chromous Acid DCrO2

T. Maekawa Department of Chemistry, Graduate School of Science, Osaka University
,
O. Yamamuro Department of Chemistry, Graduate School of Science, Osaka University
,
A. Inaba Department of Chemistry, Graduate School of Science, Osaka University
,
T. Matsuo Department of Chemistry, Graduate School of Science, Osaka University
,
M. Ohama Department of Chemistry, Graduate School of Science, Osaka University
,
M. Ichikawa Department of Physics, Graduate School of Science, Hokkaido University
&
T. Tsuchida Department of Applied Chemistry, Graduate School of Engineering, Hokkaido University
 show all
Pages 149-155 | Received 15 May 2006, Published online: 29 Mar 2007
 
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Abstract

A phase transition occurring at 320 K in DCrO 2 but not in HCrO 2 has been investigated by infrared spectroscopy. The hydrogen bond bending vibration is sensitive to the phase transition, the peak frequency changing sharply with temperature at the transition temperature. The Cr-O vibration region is also sensitive to temperature. The absorption peak occurring at 434 cm− 1 for DCrO 2 .below 320 K has been examined closely with respect to the intensity and band width. Dispersion-like anomalies in the spectra (the Evans-Fano effect) have been studied by analysis of the spectral shape function.

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