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Applied Physics Letters / Volume 98 / Issue 5 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 98, 052509 (2011); http://dx.doi.org/10.1063/1.3549179 (3 pages)

Effect of vanadium deficiency on properties of polycrystalline LaVO3

S. Jamali Gharetape1, M. P. Singh1, F. S. Razavi1, D. A. Crandles1, L. Y. Zhao2, and K. T. Leung2

1Department of Physics, Brock University, St. Catharines, Ontario L2S 3A1, Canada
2Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada

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(Received 27 September 2010; accepted 6 January 2011; published online 2 February 2011)

We report the influence of V deficiency on structure, transport, and magnetic properties of polycrystalline LaVO3. Up to 10% V-deficient samples were synthesized using standard solid state chemistry route. Structural and spectroscopic studies show that it intricately modifies lattice parameters and oxidation states of V. Further temperature dependent resistivity data reveal that V deficiency induces an enhancement in the resistivity and activation energy. The paramagnetic moment of these samples depends on net V composition while all samples exhibit a paramagnetic-to-antiferromagnetic transition at about 140 K. These distinct properties are understood owing to the presence of multiple oxidations states of V, predominantly V3+ and V4+, in nonstoichiometric LaVO3.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

antiferromagnetic materials, crystal structure, electrical resistivity, ferromagnetic-paramagnetic transitions, lanthanum compounds, lattice constants, materials preparation, oxidation, paramagnetic materials, stoichiometry

PACS

  • 61.66.Fn

    Inorganic compounds

  • 72.20.Fr

    Low-field transport and mobility; piezoresistance

  • 72.80.Sk

    Insulators

  • 75.20.Ck

    Nonmetals

  • 75.30.Kz

    Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)

  • 75.50.Ee

    Antiferromagnetics

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3549179

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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