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Diffuse x-ray scattering in perovskite ferroelectrics

  • B. D. Chapman
  • , E. A. Stern*
  • , S. W. Han
  • , J. O. Cross
  • , G. T. Seidler
  • , V. Gavrilyatchenko
  • , R. V. Vedrinskii
  • , V. L. Kraizman
  • *Corresponding author for this work
  • University of Washington
  • Brookhaven National Laboratory
  • United States Department of Energy
  • Southern Federal University

Research output: Contribution to journalJournal articlepeer-review

Abstract

Diffuse x-ray scattering measurements on the cubic paraelectric phase of single-crystal PbTiO 3 are presented. No diffuse scattering sheets are found, in contrast to sheets observed in the cubic paraelectric phases of BaTiO 3 and KNbO 3. A quantitative analysis of the diffuse scattering indicates that the soft-mode branch contribution to sheets is negligible in all three ferroelectric perovskites. Differences in the diffuse scattering are explained by differences in the disordering of the local displacements, thus resolving a long-standing controversy.

Original languageEnglish
Article number020102
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number2
DOIs
StatePublished - 2005.01

Quacquarelli Symonds(QS) Subject Topics

  • Materials Science
  • Physics & Astronomy

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