Concentration dependence of magnetic and electrical properties of gap-type antiferromagnetic MnPt alloys

R. Y. Umetsu, K. Fukamichi, A. Sakuma

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14 Citations (Scopus)

Abstract

Concentration dependence of the magnetic and electrical properties of MnPt alloy system with a AuCu-I type crystal structure has been investigated in order to discuss the electronic state. Temperature dependence of the electrical resistivity shows a characteristic behavior of gap-type antiferromagnets and the electronic specific heat coefficient γ is considerably small in consistent with the calculated band structure having a pseudo-gap around the Fermi level. In the vicinity of the equiatomic composition, the Néel temperature is highest, whereas the value of γ is smallest and increases with decreasing the Néel temperature. From the present experimental results, a close relationship between the electronic state and the antiferromagnetic stability in this alloy system is revealed, in accord with the band calculations.

Original languageEnglish
Pages (from-to)8873-8875
Number of pages3
JournalJournal of Applied Physics
Volume91
Issue number10 I
DOIs
Publication statusPublished - 2002 May 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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