Colossal Magnetoresistance in the Transition-Metal Zintl Compound Eu14MnSb11

Julia Y. Chan, Susan M. Kauzlarich, Peter Klavins, Robert N. Shelton, David J. Webb

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85 Scopus citations

Abstract

Magnetoresistance measurements have been carried out on single-crystal sample of the transition-metal Zintl compound Eu14MnSb11. Eu14MnSb11 is the first compound of the Ca14-AlSb11 structure type in which magnetoresistive effects have been measured. Colossal magnetoresistance (CMR) at 92 K and 5 T with Δρ/ρ(0) = -36% and at 5 K and 5 T with Δρ/ρ(0) = -42% were observed. CMR is observed at the ferromagnetic-paramagnetic phase transition (92 K). A large negative magnetoresistance is observed below the second magnetic transition (15 K) and is attributed to a field-induced antiferromagnetic-ferromagnetic ordering of the Eu2+ lattice. The MR is highly anisotropic with respect to the crystallographic axes. A sign change in the curvatures of ρ(H) curves below and above 92 K has been observed, indicating that two different mechanisms are responsible for the magnetic scattering of the carriers in two separate temperature regions.

Original languageEnglish (US)
Pages (from-to)3132-3135
Number of pages4
JournalChemistry of Materials
Volume9
Issue number12
StatePublished - Dec 1997

ASJC Scopus subject areas

  • Materials Science(all)
  • Materials Chemistry

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