Synthesis, structure, and magnetic characterization of Cr4US8

Matthew D. Ward, Ian Y. Chan, Christos D. Malliakas, Minseong Lee, Eun Sang Choi, James A. Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The compound Cr4US8 has been synthesized at 1073 K and its crystal structure has been determined at 100 K. The structure is modulated with a two-fold commensurate supercell. The subcell may be indexed in an orthorhombic cell but weak supercell reflections lead to the monoclinic superspace group P21/c(α0γ)0s with two Cr sites, one U site, and four S sites. The structure comprises a three-dimensional framework of CrS6 octahedra with channels that are partially occupied by U atoms. Each U atom in these channels is coordinated by eight S atoms in a bicapped trigonal-prismatic arrangement. The magnetic behavior of Cr4US8 is complex. At temperatures above ~120 K at all measured fields, there is little difference between field-cooled and zero field-cooled data and χ(T) decreases monotonously with temperature, which is reminiscent of the Curie-Weiss law. At lower temperatures, the temperature dependence of χ(T) is complex and strongly dependent on the magnetic field strength.

Original languageEnglish (US)
Pages (from-to)67-74
Number of pages8
JournalJournal of Solid State Chemistry
Volume233
DOIs
StatePublished - Jan 1 2016

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Keywords

  • Cr/U
  • Magnetism
  • Modulation
  • Structure

ASJC Scopus subject areas

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

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