Heat treatment effect on the magnetic properties and martensitic transformations of MnCoGe

Kohei Noguchi, Ryota Kobayashi, Yoshifuru Mitsui, Rie Y. Umetsu, Jun Gouchi, Yoshiya Uwatoko, Keiichi Koyama

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1 Citation (Scopus)

Abstract

X-ray powder diffraction, differential scanning calorimetry, and magnetization measurements were performed to investigate the effects of heat treatment on the magnetic and structural properties of as-cast and aging treated MnCoGe. The martensitic transformation temperature of the as-cast sample was 526 K for its first heating cycle, which decreased with repeating thermal cycles of 300–1273 K. MnCoGe prepared by aging treatment of 873 K for 7 days showed a first-order magnetic transition, which was accompanied by a martensitic transformation at 307 K. However, the transformation was not detected when the aging temperature was increased up to 973 K. The martensitic transformation temperature and volume of the parent phase was found to have a positive correlation.

Original languageEnglish
Article number166199
JournalJournal of Magnetism and Magnetic Materials
Volume499
DOIs
Publication statusPublished - 2020 Apr 1

Keywords

  • Heat treatment
  • Magnetostructural transition
  • Martensitic transformation
  • MnCoGe

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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