Pressure-induced phase transitions in α-ZrMo₂O₈

Summary, in English

We report high-pressure Raman, infrared (IR), and optical-absorption spectra of α-ZrMo₂O₈ (trigonal) up to 38 GPa at room temperature. The spectroscopic studies are consistent with diffraction results that show that α-ZrMo₂O₈ transforms into δ-ZrMo₂O₈ (monoclinic) at about 1 GPa and the δ phase converts to the ε phase (triclinic) at about 2.0 GPa. Optical-absorption measurements give an estimate of the band gap of about 0.6 eV at the lowest pressure. Band-gap changes with pressure are confirmed with visual observations. ZrMo₂O₈ changes from transparent at 5 GPa to yellow at 10 GPa, red at 18 GPa, and at about 30 GPa it becomes opaque.

• Författare: D. V S Muthu; B. Chen; J. M. Wrobel; A. M Krogh Andersen; S. Carlson; M. B. Kruger
• Avdelning/ar: MAX IV-laboratoriet
• Publiceringsår: 2002-02-01
• Språk: Engelska
• Sidor: 641011-641015
• Publikation/Tidskrift/Serie: Physical Review B (Condensed Matter)
• Volym: 65
• Issue: 6
• Dokumenttyp: Artikel i tidskrift
• Förlag: American Physical Society
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 0163-1829