Magnetic properties and phase stability of half-metal-type Co 2Cr1-xFexGa alloys

K. Kobayashi, R. Y. Umetsu, Asaya Fujita, K. Oikawa, R. Kainuma, K. Fukamichi, K. Ishida

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The magnetic properties and phase stability of half-metal-type Co 2Cr1-xFexGa alloys were investigated by differential scanning calorimetry (DSC), in a superconducting quantum interference device (SQUID) magnetometer and in a vibrating sample magnetometer (VSM), and by transmission electron microscopy (TEM). It was found that the L21-type single-phase is obtainable for the entire concentration of x and that the value of the saturation magnetic moment Ms at 4.2 K in the lower composition range of x is in agreement with the generalized Slater-Pauling line, while it is rather larger than the generalized Slater-Pauling line above x = 0.6. The Curie temperature Tc monotonically increases, whereas the transition temperature from the L2 1- to B2-type phase TtB2/L21 is almost constant at 1082 ± 13 K with increasing x.

Original languageEnglish
Pages (from-to)60-63
Number of pages4
JournalJournal of Alloys and Compounds
Volume399
Issue number1-2
DOIs
Publication statusPublished - 2005 Aug 16

Keywords

  • L2-type phase
  • Magnetic moment
  • Order-disorder transition
  • Spintronic devices

ASJC Scopus subject areas

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

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