Trimers of MnO 6 octahedra and ferrimagnetism of Ba 4 NbMn 3 O 12

Loi T. Nguyen, Tai Kong, R. J. Cava

Research output: Contribution to journalArticle

Abstract

Ba 4 NbMn 3 O 12 is reported, synthesized by a solid state method in air. The crystal structure, determined by performing refinements on room temperature powder x-ray diffraction data by the Rietveld method, consists of Mn 3 O 12 trimers in the configuration of three face-sharing MnO 6 octahedra, with the trimers arranged in triangular planes. An effective moment of 4.82 μ B /f.u is observed and competing antiferromagnetic and ferromagnetic interactions between Mn ions are inferred from the Weiss temperature of -4 K and the ferrimagnetic ordering transition of approximately 42 K. Ba 4 NbMn 3 O 12 is a semiconductor with a transport activation energy of 0.37 eV.

Original languageEnglish (US)
Article number056108
JournalMaterials Research Express
Volume6
Issue number5
DOIs
StatePublished - Jan 1 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys

Keywords

  • Magnetism
  • ferrimagnetism
  • manganese trimer
  • triangular lattice

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