Effect of mechanical alloying on the pressure dependence of the Curie temperature of Ni-20 at% Mn alloy

N. Q. Sun, Y. Matsushima, D. Nishida, T. Kobayashi, M. Matsushita, S. Endo, F. Ono

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

AC susceptibility measurements in mechanically alloyed (MA) Ni-20 at% Mn were made under hydrostatic pressures up to 7.5 GPa. The results were compared with a bulk alloy made by the conventional method of melting. The Curie temperature decreased with pressure at the rate of -6.9 and -8.0 K/GPa in MA and the bulk alloy, respectively. The transition temperature to the reentrant spin glass state increased at the rate of 1.2 and 1.7 K/GPa in MA and the bulk alloy, respectively. The results were explained by assuming a Gaussian distribution of concentration fluctuation.

Original languageEnglish
Pages (from-to)37-43
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume301
Issue number1
DOIs
Publication statusPublished - Jun 2006

Keywords

  • Magnetic-phase transition
  • Mechanical alloys
  • Ni-Mn alloys
  • Pressure effect

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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