Effect of external fields on ordering of FePd

K. Tanaka, T. Ichitsubo, M. Koiwa

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

When single crystals of equiatomic FePd in the disordered state are held at temperatures below the ordering temperature (923 K) but above 780 K, their transformation is markedly affected by application of either a compressive stress or a magnetic field. The distribution between orientational variants is affected, as expected, but also the volume fraction transformed and the rate of transformation change, each by as much as an order of magnitude. These effects are explained in terms of a change in nucleation rate brought about by the applied fields, and the associated development of an oriented internal stress field. The lower bound temperature of 780 K is identified with the spinodal ordering temperature for the transformation. A computer simulation based on the Ginzburg-Landau approach clearly supports these explanations.

Original languageEnglish
Pages (from-to)118-127
Number of pages10
JournalMaterials Science and Engineering A
Volume312
Issue number1-2
DOIs
Publication statusPublished - 2001 Aug 15
Externally publishedYes

Keywords

  • Magnetics field
  • Mono-variant structure
  • Order-disorder transformation
  • Stress field

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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