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Investigations of Low Temperature Phase Transitions in BiFeO sub(3) Ceramic by Infrared Spectroscopy

In this paper, results of new infrared FIR-MIR measurements (wavenumber range of 4000-100 cm super(-1)) in the range of the temperature 300 [divide] 8 K of the BiFeO sub(3) ceramic are presented. Below 200 K only one symmetric band at ca. 800 cm super(-1) is visible. The full width at half maximum o...

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Published in:	Ferroelectrics 2011-01, Vol.417 (1), p.63-69
Main Authors:	Bujakiewicz-Koronska, R, Hetmanczyk, L, Garbarz-Glos, B, Budziak, A, Koronski, J, Hetmanczyk, J, Antonova, M, Kalvane, A, Nalecz, D
Format:	Article
Language:	English
Subjects:	Bands Ceramics Cooling Ferroelectric materials Infrared Infrared spectroscopy Phase transformations Shoulders
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container_title	Ferroelectrics
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creator	Bujakiewicz-Koronska, R Hetmanczyk, L Garbarz-Glos, B Budziak, A Koronski, J Hetmanczyk, J Antonova, M Kalvane, A Nalecz, D
description	In this paper, results of new infrared FIR-MIR measurements (wavenumber range of 4000-100 cm super(-1)) in the range of the temperature 300 [divide] 8 K of the BiFeO sub(3) ceramic are presented. Below 200 K only one symmetric band at ca. 800 cm super(-1) is visible. The full width at half maximum of this band decreases exponentially on cooling. The shape of the band at ca. 545 cm super(-1)connected with A1 (TO) mode also changes between 60-40 K, this is in the vicinity of the phase transition at 50 K. Initially a broad band reveals its components as shoulder bands. Theirs FWHM decrease with cooling.
doi_str_mv	10.1080/00150193.2011.578495
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subjects	Bands Ceramics Cooling Ferroelectric materials Infrared Infrared spectroscopy Phase transformations Shoulders
title	Investigations of Low Temperature Phase Transitions in BiFeO sub(3) Ceramic by Infrared Spectroscopy
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