Short-range disorder in lanthanum-doped lead titanate ceramics probed by Raman scattering
- 23 February 1998
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 72 (8) , 897-899
- https://doi.org/10.1063/1.120929
Abstract
Raman scattering has been used to probe short-range structural information on lanthanum-doped lead titanate ceramics (LaxPb1−xTiO3) for x, ranging from 0.0 to 0.30. In highly doped samples (x>0.27), x-ray diffraction measurements indicate a cubic structure, although measurements of Raman scattering at temperatures above and below the tetragonal to cubic transition showed a residual short-range structural disorder in the cubic phase. Moreover, for these highly lanthanum-doped samples, a well-defined temperature-induced ferro–paraelectric phase transition disappears, which suggests a relationship between local disorder and relaxor behavior in this material.Keywords
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