Phase transition study on degenerate modes of Pb(Yb1/2Nb1/2)O-3 and Pb(Yb1/2Ta1/2)O-3

Pb(Yb1/2Nb1/2)O-3 [PYN] and Pb(Yb1/2Ta1/2)O-3 [PYT] are highly ordered enough to be a prototype for spectroscopic studies of complex lead-based perovskite compounds Pb(B', B")O-3 system. We find out changes in the numbers of vibrational mode at each phase by Raman scattering. PYN based antiferroelectrics have the modes with the triple degeneracy. It may originate from antiparallel arrangements of cations and the accompanied octahedral tilting. PYT systems display an additional degeneracy as lowering a temperature. These results implicate Raman spectroscopy is more efficient than other methods for characterizing phases of PYN and PYT.
Publisher
Taylor & Francis Ltd
Issue Date
2004
Language
ENG
Keywords

PEROVSKITE FERROELECTRICS; RELAXOR FERROELECTRICS; TANTALATE; CERAMICS; BEHAVIOR; NIOBATE; ORDER

Citation

INTEGRATED FERROELECTRICS, v.67, pp.159 - 166

ISSN
1058-4587
URI
http://hdl.handle.net/10203/82421
Appears in Collection
MS-Journal Papers(저널논문)
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