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X-ray diffraction study revealing phase coexistence in barium titanate stannate

Published online by Cambridge University Press:  01 October 2004

Volkmar Mueller ,
Horst Beige ,
Hans-Peter Abicht  and
Christian Eisenschmidt
Volkmar Mueller*
Affiliation:
Fachbereich Physik, Martin-Luther-Universität Halle, D-06108 Halle, Germany
Horst Beige
Affiliation:
Fachbereich Physik, Martin-Luther-Universität Halle, D-06108 Halle, Germany
Hans-Peter Abicht
Affiliation:
Fachbereich Chemie, Martin-Luther-Universität Halle, D-06120 Halle, Germany
Christian Eisenschmidt
Affiliation:
Fachbereich Physik, Martin-Luther-Universität Halle, D-06120 Halle, Germany
*
a)Address all correspondence to this author.e-mail: mueller@physik.uni-halle.de
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Abstract

In this paper, the results of a temperature dependent x-ray diffraction (XRD) study on BaTi0.95Sn0.05O3 (BTS-5) ceramics are compared with dielectric measurements. The orthorhombic-tetragonal phase transition at T2 = 306 K is found to proceed in a considerably wider temperature range than expected from the dielectric anomaly. Although the macroscopic properties of BTS-5 indicate a rather sharp ferroelectric phase transition at Tc = 358K, we observe anomalous XRD-patterns in a 25 K wide temperature range. This is interpreted in terms of mechanically clamped tetragonal and cubic phase, coexisting in the vicinity of Tc in grains with inhomogeneous Sn-distribution.

Keywords

FerroelectricityPhase transformationX-ray diffraction (XRD)
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 10 , October 2004 , pp. 2834 - 2840
Copyright
Copyright © Materials Research Society 2004

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References

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