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High-pressure Raman and infrared study of ZrV2O7

Författare:
  • U. L. C. Hemamala
  • F. El-Ghussein
  • D. V. S. Muthu
  • A. M. Krogh Andersen
  • Stefan Carlson (PhD)
  • L. Ouyang
  • M. B. Kruger
Publiceringsår: 2007
Språk: Engelska
Sidor: 680-684
Publikation/Tidskrift/Serie: SOLID STATE COMMUNICATIONS
Volym: 141
Nummer: 12
Dokumenttyp: Artikel
Förlag: PERGAMON-ELSEVIER SCIENCE LTD

Sammanfattning

The room-temperature Raman and infrared spectra of zirconium vanadate (ZrV2O7) were observed up to pressures of 12 GPa and 5.7 GPa, respectively. The frequencies of the optically active modes at ambient pressure were calculated using direct methods and compared with experimental values. Average mode Gruneisen parameters were calculated for the Raman and infrared active modes. Changes in the spectra under pressure indicate a phase transition at similar to 1.6 GPa, which is consistent with the previously observed a (cubic) to (pseudo-tetragonal) phase transition, and changes in the spectra at similar to 4 GPa are consistent with an irreversible transformation to an amorphous structure. (C) 2007 Elsevier Ltd. All rights reserved.

Disputation

Nyckelord

  • Physics and Astronomy
  • light absorption and
  • inelastic light scattering
  • strain
  • high pressure
  • reflection

Övrigt

Published
Yes
  • ISSN: 0038-1098

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