An investigation of structural, magnetic and dielectric properties of R2NiMnO6 (R = rare earth, Y)

R. J. Booth, R. Fillman, H. Whitaker, Abanti Nag, R. M. Tiwari, K. V. Ramanujachary, J. Gopalakrishnan, S. E. Lofland

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We have investigated the structure, magnetic and dielectric properties of the double perovskite oxides, R2NiMnO6 (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho and Y). We could refine powder X-ray diffraction patterns of all the phases on the basis of monoclinic (P21/n) double perovskite structure where Ni and Mn atoms are ordered at 2c and 2d sites, respectively. All the phases are ferromagnetic insulators exhibiting relatively low dielectric loss and dielectric constants in the range 15-25. The ferromagnetic ordering temperature of the R2NiMnO6 series seems to correlate better with the radius of R3+ atoms than with the average Ni-O-Mn angle (φ) in the double perovskite structure. These results are consistent with all samples having Mn4+ and Ni2+ with minimal antisite disorder.

Original languageEnglish (US)
Pages (from-to)1559-1564
Number of pages6
JournalMaterials Research Bulletin
Issue number7
StatePublished - Jul 1 2009

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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