Disrupted antiferromagnetism in the brannerite MnV2O6

Simon A. J. Kimber, J. Paul Attfield

Research output: Contribution to journalArticlepeer-review

Abstract

Magnetic order in brannerite type MnV2O6 has been studied by magnetization measurements and low temperature powder neutron diffraction. A sharp transition to a three-dimensionally ordered antiferromagnetic state is observed at T-N=20 K. Neutron diffraction at 5 K shows the spin structure to have a (0 0 1/2) propagation vector with Mn2+ moments of 4.77(7) mu(B) ordered parallel to b. Observed ferromagnetic order within chains of edge-sharing MnO6 octahedra is consistent with a positive Weiss temperature of 5.8 K. The long range coherence of the magnetic order is limited, with a coherence length of 900 A resulting from dilution of the Mn sites by 3% V due to intrinsic antisite disorder. The magnetic behavior of MnV2O6 is markedly different to that of the analogue CuV2O6 in which spin chain correlations were reported.

Original languageEnglish
Article number064406
Pages (from-to)-
Number of pages4
JournalPhysical review B: Condensed matter and materials physics
Volume75
Issue number6
DOIs
Publication statusPublished - Feb 2007

Keywords

  • LITHIUM SECONDARY BATTERY
  • ANODIC PERFORMANCE
  • SHORT-RANGE
  • SUSCEPTIBILITY
  • ALPHA-CUV2O6
  • VANADATES
  • NUCLEAR
  • POWDER
  • CUV2O6
  • OXIDE

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