Magnetic structures and their stability in Mn3Rh ordered and disordered alloys

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

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The electronic and magnetic structure of Mn3Rh, including noncollinear structures, in the ordered and disordered states have been investigated by the tight-binding linear-muffin-tin orbital method. A magnetic long-range order of the triangular (T1) structure in the ordered state is reflected in a dip around the Fermi level in the density of states. This characteristic feature can be retained in the multiple-Q spin-density-wave (SDW) structures in the disordered alloy, implying that a stable antiferromagnetic order also remains in the disordered alloy. The most stable structure in the disordered alloy is suggested to be the 3Q-SDW structure. From the effective exchange constant, the Néel temperature in the disordered alloy is estimated to be about 680 K, close to the experimental value of about 700 K. Compared to the Néel temperature of pure γ-Mn metal, such a high value is pertinent to the change in the electronic structure caused by the addition of Rh.

Original languageEnglish
Article number014432
Pages (from-to)144321-144326
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number1
DOIs
Publication statusPublished - 2002 Jul 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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