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High-pressure Raman scattering and x-ray diffraction of the relaxor ferroelectric 0.96Pb(Zn1/3Nb2/3)O-3-0.04PbTiO(3)

Research output: Contribution to journalArticle

  • M Ahart
  • RE Cohen
  • V. V. Struzhkin
  • E Gregoryanz
  • D Rytz
  • SA Prosandeev
  • HK Mao
  • RJ Hemley

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Original languageEnglish
Article number144102
Number of pages7
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume71
Issue number14
DOIs
Publication statusPublished - Apr 2005

Abstract

High-pressure Raman scattering and x-ray diffraction of lead zinc niobate-lead titanate (PZN-4%PT) solid solution were measured from ambient pressure to 13 GPa. All of the Raman peaks are broad due to the disorder of Zn2+ and Nb5+ on the B site of the perovskite structure. The pressure shifts of the Raman bands are reversible, and no pressure-induced soft phonon modes were found. X-ray diffraction as a function of pressure revealed diffuse scattering near the Bragg peaks, and gave a bulk modulus of 111 GPa assuming K'=4. Allowing K' to vary gave a large value K'=12 and K-0=90 GPa. Changes in both the Raman spectra and the diffuse scattering reflect suppression of the local distortions in the material on compression.

    Research areas

  • 0.955PB(ZN1/3NB2/3)O-3-0.045PBTIO(3) SINGLE-CRYSTALS, LEAD MAGNESIUM NIOBATE, PBMG1/3NB2/3O3, SPECTROSCOPY, STATES, PHASE, ORDER

ID: 11476725