Titanium K-edge XAS study on local structure of Pb1-xCaxTiO3 ferroelectric ceramics
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Graduate program
Undergraduate course
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Publisher
Trans Tech Publications Ltd
Type
Work presented at event
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Acesso aberto
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Abstract
In order to characterize the local structure of Pb1-xCaxTiO3 (PCT) samples, Ti K-edge XANES measurements were performed and showed that Ca incorporation to PbTiO3 structure leads to a decreasing of local distortion of Ti atoms in relation to oxygen atoms at the TiO6 octahedra. Moreover, according to EXAFS measurements, the local structure around Ti atoms exhibits tetragonal symmetry with P4mm space group for samples with x <= 0.475, whereas orthorhombic symmetry with Pbnm space group was observed for x equals to 0.50 and 0.55.
Description
Keywords
Pb1-xCaxTiO3, Structural phase transition, XANES, EXAFS
Language
English
Citation
Electroceramics Vi. Stafa-zurich: Trans Tech Publications Ltd, v. 975, p. 29-35, 2014.
