[formula omitted] A novel antiferromagnetic rare-earth polychalcogenide

J. A. Cowen, P. Michlin, J. Kraus, S. D. Mahanti, J. A. Aitken, M. G. Kanatzidis

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Abstract

The reaction of Eu with a molten mixture of [formula omitted] and excess Se has produced a new rare earth dichalcogenide, [formula omitted] with a type “a” antiferromagnetic structure. The compound crystallizes in the tetragonal space group [formula omitted] forming into small single crystal rectangular blocks with their long axis along c. The high temperature magnetic susceptibility exhibits Curie–Weiss behavior with a ferromagnetic [formula omitted] and an effective moment [formula omitted] magnetons consistent with the theoretical value of 7.94 for the [formula omitted] free ion. There is a peak in [formula omitted] at [formula omitted] which is attributed to an antiferromagnetic transition. At [formula omitted] with the magnetic field, H, applied along c, [formula omitted] exhibits a sharp increase near 1.5 T attributed to a metamagnetic transition. With H along a the moments saturate at about 5 T. A simple mean field model in which the Eu ions in the ab plane are coupled into ferromagnetic sheets, with alternate sheets along c coupled antiferromagnetically to form a bulk antiferromagnet is used to interpret the data.

Original languageEnglish
Pages (from-to)5381-5383
Number of pages3
JournalJournal of Applied Physics
Volume85
Issue number8
DOIs
Publication statusPublished - Apr 15 1999

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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