Pressure-induced amorphization of La1/3TaO3

O. Noked, A. Melchior, R. Shuker, T. Livneh, R. Steininger, B. J. Kennedy, E. Sterer

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

La1/3TaO3, an A-site cation deficient perovskite, has been studied under pressure by synchrotron X-ray powder diffraction and Raman spectroscopy. It undergoes irreversible pressure induced amorphization at P=18.5 GPa. An almost linear unit cell volume decrease vs. pressure is observed from ambient pressure up to the phase transition. The Raman spectroscopy also shows amorphization at the same pressure, with positive shifts of all modes as a function of pressure. The pressure dependence of the Eg and A 1g Raman modes arising from the octahedral oxygen network is discussed.

Original languageEnglish
Pages (from-to)38-42
Number of pages5
JournalJournal of Solid State Chemistry
Volume202
DOIs
StatePublished - 1 Jun 2013

Keywords

  • High pressure
  • Perovskite
  • Pressure induced amorphization

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