Magnetic and electrical properties of Eu2VO4

K. V. Ramanujachary, J. E. Sunstrom IV, I. Fawcett, P. Shuk, M. Greenblatt, M. Croft, I. Nowik, R. H. Herber, S. Khalid

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Eu2VO4 with the K2NiF4-type structure was prepared by heating Eu2O3, V2O5, and V metal at 1473 K in an evacuated silica ampoule. Rietveld refinement of the powder X-ray diffraction (XRD) data confirmed the presence of layers of corner-shared VO6 octahedra with V-O bond distances of 1.928(1) angstrom (× 4) and 2.04(2) angstrom (× 2) perpendicular to the tetragonal c axis. X-ray absorption near-edge spectroscopy (XANES) indicated that the Eu is mixed-valent [Eu(II)/Eu(III)], while vanadium exists exclusively in the trivalent state. These valence assignments were supported by the results of temperature-dependent magnetic susceptibility and Mossbauer spectroscopy data. Variable temperature electrical resistivity measurements indicated that the sample was insulating (ρRT ≈ 104 Ω-cm). The compound undergoes a charge-ordering transition associated with the Eu sublattice at 445 K, as evidenced by Mossbauer spectroscopy, electrical resistivity, and in situ high temperature X-ray diffraction studies.

Original languageEnglish (US)
Pages (from-to)803-816
Number of pages14
JournalMaterials Research Bulletin
Issue number5
StatePublished - Mar 15 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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