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EXAFS, X-ray diffraction and Raman studies of (Pb1-xLax)(Zr0.65Ti0.35)O3 (x = 0.04 and 0.09) ceramics irradiated by high-current pulsed electron beam

  • V. V. Efimov*
  • , E. A. Efimova
  • , K. Iakoubovskii
  • , S. Khasanov
  • , D. I. Kochubey
  • , V. V. Kriventsov
  • , A. Kuzmin
  • , B. N. Mavrin
  • , M. Sakharov
  • , V. Sikolenko
  • , A. N. Shmakov
  • , S. I. Tiutiunnikov
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We report the effect of pulsed electron beam irradiation on the long-range and short-range atomic structure, as well as on the Raman phonon modes, of perovskite (Pb1-xLax)(Zr0.65Ti0.35)O3, x = 0.04 and 0.09 (PLZT 4/65/35 and 9/65/35) ferroelectric ceramics. X-ray powder diffraction (XRD) spectra from the single-pulse-irradiated PLZT 9/65/35 samples reveal transformation of the cubic Pm3m (Z = 1) into the orthorhombic Pmmm (Z = 1) structure. This symmetry change is however not observed for 10-pulse irradiation performed under the same conditions: here only an increase in the coherent scattering regions, lattice volume, and the Zr-O distance distribution is observed, as revealed by XRD and X-ray absorption spectroscopy at Zr K-edge. Raman scattering from PLZT 9/65/35 ceramics is in agreement with the symmetry reduction after single-pulse irradiation and reveals significant Raman signal intensity decrease after multiple-pulse irradiation. On the contrary, no significant structural changes could be detected in PLZT 4/65/35 ceramics after single- or multiple-pulse irradiation. Possible mechanisms of pulsed electron irradiation effects in PLZT 4/65/35 and 9/65/35 ceramics are discussed.

Original languageEnglish
Pages (from-to)2007-2012
Number of pages6
JournalJournal of Physics and Chemistry of Solids
Volume67
Issue number9-10
DOIs
Publication statusPublished - Sept 2006

Keywords

  • A. Ceramics
  • C. Raman spectroscopy
  • C. X-ray diffraction
  • C. XAFS (EXAFS and XANES)
  • D. Defects
  • D. Radiation damage

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