Magnetic and chemical order-disorder transformations in Co 2Fe(Ga 1-xSi x) and Co 2Fe(Al 1-ySi y) Heusler alloys

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Abstract

The concentration dependence of the order-disorder phase transformation temperature from the L2 1 to the B2 phase (T t L21/B2) and magnetic properties of Co 2Fe(Ga 1-xSi x) and Co 2Fe(Al 1-ySi y) Heusler alloys were investigated. In the phase diagrams, a crossover of the Curie temperature (T C) and T t L21/B2 was confirmed at around y 0.45 in Co 2Fe(Al 1-ySi y), whereas the T C and T t L21/B2 monotonically changed with x in Co 2Fe (Ga 1-xSi x). The slopes of the linear concentration dependence of T t L21/B2 for Co 2Fe(Al 1-ySi y) drastically changed at about y 0.45, suggesting that the chemical interchange energy between Fe and Al in Co 2FeAl alloy is affected by the magnetic ordering.

Original languageEnglish
Article number073909
JournalJournal of Applied Physics
Volume111
Issue number7
DOIs
Publication statusPublished - 2012 Apr 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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