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Electronic, magnetic and structural properties ofA2VMoO6perovskites (A=Ca, Sr)

Authors
Journal
Journal of Solid State Chemistry
0022-4596
Publisher
Elsevier
Publication Date
Volume
179
Issue
7
Identifiers
DOI: 10.1016/j.jssc.2006.04.013
Keywords
  • Metallic Perovskite Oxides
  • Pauli Paramagnetic Oxides
Disciplines
  • Chemistry
  • Engineering

Abstract

Abstract The perovskites Sr 2VMoO 6 and Ca 2VMoO 6 have been synthesized by liquid-mix technique in citrate melts, and their electronic, magnetic and structural properties have been investigated. No signs of V/Mo ordering are seen by synchrotron X-ray powder diffraction, but despite the chemical disorder both oxides are highly conductive and Pauli paramagnetic. Electrical conductivities of these solid solutions are comparable or higher than those reported for polycrystalline AMoO 3 end members. It is suggested that the delocalized metallic conductivity of these compounds with two different transition-metal atoms implies valence equilibrium between the degenerate oxidation-state couples V 4+Mo 4+ and V 3+Mo 5+.

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