Ab-initio study on the magnetic structures in the ordered Mn3Pt alloy

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Abstract

We study the electronic states of the magnetically ordered Mn3Pt alloy within the density functional theory. Mn3Pt has been believed that one third of Mn atoms have no magnetic moment in an antiferromagnetic phase (so-called the F-phase) realized in the temperature range of 400 K < T < 475 K. We show that this experimentally suggested spin configuration is energetically so much unfavorable that it would be irrelevant to the F-phase. We discuss the possibility that the spin moments on the one third of Mn atoms are not paramagnetic but thermally fluctuating in the F-phase. The present results have an immediate connection with the recent neutron scattering study [T. Ikeda and Y. Tsunoda, J. Phys. Soc. Jpn., vol. 72, pp. 2614-2621, October 2003].

Original languageEnglish
Pages (from-to)3131-3133
Number of pages3
JournalIEEE Transactions on Magnetics
Volume44
Issue number11 PART 2
DOIs
Publication statusPublished - 2008 Nov 1

Keywords

  • Antiferromagnetic materials
  • Manganese alloys
  • Nonlinear magnetics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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