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

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

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Article number144102
Number of pages7
JournalPhysical review B: Condensed matter and materials physics
Volume71
Issue number14
DOIs
Publication statusPublished - Apr 2005

Keywords

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

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