Volume 66, Number 1, April 2004
|Page(s)||48 - 54|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 March 2004|
Beam fanning used to study thermal disorder and decay of polar structures in the ferroelectric relaxor
Institute of Physics - Science Ave. 46, 03650 Kiev-39, Ukraine
2 Institute for Mineralogy, University of Cologne - Cologne, Germany
3 Department of Physics, University Osnabrück - Osnabrück, Germany
Accepted: 8 January 2004
A new photorefractive approach using the temperature evolution of beam fanning to study the polar structure of the ferroelectric relaxor strontium-barium-niobate (SBN) undergoing the ferroelectric-paraelectric phase transition is proposed. A strong temperature dispersion of the decay of polar structures of different sizes is observed. We compare our results with those obtained by other measurement methods to show their dependence on the size distribution of the polar structures.
PACS: 42.65.Hw – Phase conjugation; photorefractive and Kerr effects / 77.80.-e – Ferroelectricity and antiferroelectricity / 78.20.Jq – Electrooptical effects
© EDP Sciences, 2004
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