The Néel temperature of [formula omitted] alloys in ordered and disordered states

R. Yamauchi, K. Fukamichi, H. Yamauchi, A. Sakuma, J. Echigoya

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12 Citations (Scopus)


The concentration dependence of the room-temperature lattice constant and the Néel temperature of [formula omitted] [formula omitted] disordered and ordered alloys was investigated in order to clarify the difference in the antiferromagnetic properties. The room-temperature lattice constant increases with increasing x and the difference between the disordered and ordered alloys was hardly observed. The Néel temperature increases with increasing x in both the disordered and ordered states. This behavior is not explained by the variation of the strength of the exchange interaction as a function of the Mn–Mn distance but by the number of [formula omitted] electrons in the Mn site. The Néel temperature in the ordered state is 130–160 K higher than that in the disordered state, indicating that the exchange interaction is enhanced by ordering.

Original languageEnglish
Pages (from-to)4741-4743
Number of pages3
JournalJournal of Applied Physics
Issue number8
Publication statusPublished - 1999 Apr 15


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