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Soft mode phase transition of Sr2Bi4Ti5O18

Authors
Journal
Physics Letters A
0375-9601
Publisher
Elsevier
Publication Date
Volume
189
Issue
3
Identifiers
DOI: 10.1016/0375-9601(94)90648-3

Abstract

Abstract High temperature Raman spectra of Sr 2Bi 4Ti 5O 18 have been investigated. A first order phase transition induced by a soft mode occurs at its Curie temperature. The soft mode is connected with the unstable Bi 3+ion displacement in the perovskite-like layers.

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