Magnetic excitations in the orbital disordered phase of MnV2O4

Keisuke Matsuura, Hajime Sagayama, Amane Uehara, Yoichi Nii, Ryoichi Kajimoto, Kazuya Kamazawa, Kazuhiko Ikeuchi, Sungdae Ji, Nobuyuki Abe, Taka hisa Arima

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We have investigated the temperature dependence of magnetic dynamics in a spinel-type vanadium oxide MnV2O4 by inelastic neutron scattering. The scattering intensity of excitation around 20 meV disappears in the collinear intermediate-temperature cubic-ferrimagnetic phase, which reveals that this excitation should be peculiar to the orbital ordered phase. We have found a weakly dispersive mode emergent from a non-integer wavevector (1.4,1.4,0) at 56 K, which lies in the cubic-ferrimagnetic phase between non-coplanar ferrimagnetic and paramagnetic phases. This indicates that the probable presence of an incommensurate instability in the simple collinear structure.

Original languageEnglish
Pages (from-to)372-376
Number of pages5
JournalPhysica B: Condensed Matter
Volume536
DOIs
Publication statusPublished - 2018 May 1
Externally publishedYes

Keywords

  • Inelastic neutron scattering
  • MnVO
  • Orbital degree of freedom
  • Spin wave
  • Spinel oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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