Neutron diffraction study of the ternary transition metal Zintl compound Ca14MnSb11

Hyungrak Kim, Qingzhen Huang, Jeffrey W. Lynn, Susan M. Kauzlarich

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

The magnetic ordering of the tetragonal Ca14MnSb11 compound (space group I41/acd) has been determined by high-resolution neutron diffraction on powder samples. Neutron data were obtained at temperatures of 1.4, 10, 95K, and room temperature. Refinement of the magnetic structure reveals a ferromagnetic ordering of Mn magnetic moments lying in the a-b plane below the TC of 63 K. The low-temperature-ordered magnetic moment on the Mn ion is 3.4(2) μB at 1.4 K. The results are confirmed by magnetic susceptibility measurements, which show that the easy magnetization direction of the compound is perpendicular to the c-axis and the system orders ferromagnetically at 63K, in good agreement with neutron diffraction results. A large negative magnetoresistance effect (Δρ/ρ(H) = -34.4%) at the magnetic transition temperature is observed in applied magnetic fields up to 6 T.

Original languageEnglish (US)
Pages (from-to)162-168
Number of pages7
JournalJournal of Solid State Chemistry
Volume168
Issue number1
DOIs
StatePublished - Oct 2002

Keywords

  • Colossal magnetoresistance
  • Magnetic structure
  • Magnetocrystalline anisotropy
  • Neutron diffraction
  • Ternary transition metal zintl compound

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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