Synthesis and properties of the double perovskites La2NiVO6, La2CoVO6, and La2CoTiO6

K. L. Holman, Q. Huang, T. Klimczuk, K. Trzebiatowski, J. W.G. Bos, E. Morosan, J. W. Lynn, R. J. Cava

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Abstract

The double perovskites La2CoVO6, La2CoTiO6, and La2NiVO6, are described. Rietveld fitting of neutron and powder X-ray diffraction data show La2NiVO6 and La2CoVO6 to have a disordered arrangement of B-cations whereas La2CoTiO6 shows ordering of the B-cations (with ∼5% Co/Ti inversion). Curie-Weiss fits to the linear region of the 1/χ plots reveal Weiss temperatures of -107, -34.8, and 16.3 K for La2CoVO6, La2CoTiO6, and La2NiVO6, respectively, and magnetic transitions are observed. La2CoTiO6 prepared by our method differs from material prepared by lower-temperature routes. A simple antiferromagnetic spin model is consistent with the data for La2CoTiO6. These compounds are semiconductors with bandgaps of 0.41 (La2CoVO6), 1.02 (La2CoTiO6) and 0.45 eV (La2NiVO6).

Original languageEnglish (US)
Pages (from-to)75-83
Number of pages9
JournalJournal of Solid State Chemistry
Volume180
Issue number1
DOIs
StatePublished - Jan 2007

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Keywords

  • Antiferromagnetism
  • Double perovskite
  • LaCoTiO
  • LaCoVO
  • LaNiVO
  • Neutron diffraction
  • Semiconductor

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    Holman, K. L., Huang, Q., Klimczuk, T., Trzebiatowski, K., Bos, J. W. G., Morosan, E., Lynn, J. W., & Cava, R. J. (2007). Synthesis and properties of the double perovskites La2NiVO6, La2CoVO6, and La2CoTiO6. Journal of Solid State Chemistry, 180(1), 75-83. https://doi.org/10.1016/j.jssc.2006.09.013