Structure and magnetic properties of the REAuBi2 (RE=La-Nd, Sm) phases

Elizabeth M. Seibel, Weiwei Xie, Quinn D. Gibson, R. J. Cava

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

We present the crystal structures and basic magnetic properties of the REAuBi2 (RE=La-Nd, Sm) compounds. This isostructural family crystallizes in the tetragonal P4/nmm (no. 129) HfCuSi2-type, as determined by single crystal X-ray diffraction. Three distinct substructures are present: an RE layer, a tetrahedral AuBi layer, and a Bi square net layer. Electronic structure calculations indicate that these compounds display bands which cross the Fermi level, derived from both the Bi square net and the covalent AuBi layer. The small size of LaAuBi2 crystals precluded detailed physical property measurements, whereas large single crystals could be grown for all other phases investigated here. Single crystal measurements of CeAuBi2, PrAuBi2, and NdAuBi2 show overall antiferromagnetic ordering and decreasing magnetic anisotropy with decreasing rare earth size. SmAuBi2 also shows signatures of magnetic ordering.

Original languageEnglish (US)
Pages (from-to)318-324
Number of pages7
JournalJournal of Solid State Chemistry
Volume230
DOIs
StatePublished - Jul 25 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Keywords

  • Bismuth square net
  • Magnetic anisotropy
  • Rare earth intermetallic

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