TEM studies of domain formation mechanisms in MnV2O4

Yasukazu Murakami, Y. Nii, T. Arima, D. Shindo, K. Yanagisawa, A. Tonomura

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1 Citation (Scopus)

Abstract

Crystallographic and magnetic domains produced in a spinel-type compound MnV2O4, which exhibits a type of giant magnetostriction attributed to twin boundary motion, have been studied using transmission electron microscopy techniques. Although MnV2O4 undergoes a displacive cubic-to-tetragonal transformation upon cooling, it does not show a well-defined habit plane (i.e. the plane with a specific index that is favored for minimizing the transformation) due to the small elongation/contraction in the lattice. Electron holography demonstrates a considerable reduction in the magnetic signal by cooling the tetragonal phase to 40 K. Despite the elimination of micrometer-scale ferrimagnetic domains, weak magnetic contrast still remained, indicating small residual magnetic domains in particular portions, such as in the crosshatch of twinning pairs.

Original languageEnglish
Pages (from-to)S731-S735
JournalJournal of Alloys and Compounds
Volume577
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2013 Nov 15

Keywords

  • Magnetically ordered materials
  • Microstructure
  • Phase transitions
  • Shape memory
  • Transition metal alloys and compounds
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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    Murakami, Y., Nii, Y., Arima, T., Shindo, D., Yanagisawa, K., & Tonomura, A. (2013). TEM studies of domain formation mechanisms in MnV2O4. Journal of Alloys and Compounds, 577(SUPPL. 1), S731-S735. https://doi.org/10.1016/j.jallcom.2012.02.031