Incommensurate structures in highly ordered complex perovskites Pb(Co1/2W1/2)O3 and Pb(Sc1/2Ta1/2)O3

C. A. Randall, S. A. Markgraf, A. S. Bhalla, K. Baba-Kishi

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Abstract

A transmission electron microscopy study of two B-site order perovskites Pb(Co1/2W1/2)O3 and Pb(Sc1/2Ta1/2)O3 has revealed evidence for an incommensurate phase within the antiferroelectric and ferroelectric phase, respectively. Direct observations by dark field techniques have revealed discommensurate structures in both Pb(Sc1/2Ta1/2)O3 and Pb(Co1/2W1/2)O3. A possible lock-in transition is found in Pb(Sc1/2Ta1/2)O3, but the incommensurate to commensurate transition seems to be dependent on the degree of B-site order.

Original languageEnglish (US)
Pages (from-to)413-416
Number of pages4
JournalPhysical Review B
Volume40
Issue number1
DOIs
StatePublished - 1989

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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