New double perovskites, LaBaTaNi1-xCoxO6: Structural, dielectric and magnetic studies

S. L. Samal, T. Magdaleno, K. V. Ramanujachary, S. E. Lofland, A. K. Ganguli

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Double perovskites of the type LaBaNi1-xCoxTaO 6 (0 ≤ x ≤ 1) have been synthesized by solid state method. The compounds crystallize in the tetragonal space group, I4/m. Rietveld refinement has been carried out to determine the phase purity and to study the cation ordering. X-ray photoelectron spectroscopy confirms Co(II) in all compositions. The end members in LaBaNi1-xCoxTaO6 show high dielectric constant values. Antiferromagnetic ordering has been observed for all the compositions and the ordering temperature in LaBaNi1-xCo xTaO6 gradually decreases with increase in Co doping, which has been attributed to the decrease in covalence of Co/Ni-O bonds.

Original languageEnglish (US)
Pages (from-to)1382-1386
Number of pages5
JournalSolid State Sciences
Issue number8
StatePublished - Aug 2010

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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