Incommensurate spin order in the metallic perovskite MnVO3

Mikael Markkula, Angel M. Arevalo-Lopez, Anna Kusmartseva, Jennifer A. Rodgers, Clemens Ritter, Hua Wu, J. Paul Attfield

Research output: Contribution to journalArticlepeer-review

Abstract

Incommensurate Mn spin order has been discovered in the perovskite MnVO3 containing localized 3d5 Mn2+ and itinerant 3d1 V4+ states. This phase has a distorted Pnma crystal structure (a = 5.2741(6) Å, b = 7.4100(11) Å, and c = 5.1184(8) Å at 300 K) and is metallic at temperatures of 2-300 K and at pressures of up to 67 kbar. Neutron scattering reveals a (0.29 0 0) magnetic vector below the 46 K spin ordering transition, and both helical and spin density wave orderings are consistent with the diffraction intensities. Electronic structure calculations show large exchange splittings of the Mn and V 3d bands, and (kx 0 0) crossings of the Fermi energy by spin up and down V 3d bands may give rise to Ruderman-Kittel-Kasuya-Yosida coupling of Mn moments, in addition to their superexchange interactions.

Original languageEnglish
Article number094450
Pages (from-to)-
Number of pages5
JournalPhysical review B: Condensed matter and materials physics
Volume84
Issue number9
DOIs
Publication statusPublished - 28 Sep 2011

Keywords

  • HIGH-PRESSURE
  • PBVO3

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