Structure and Ferromagnetism of the Rare-Earth Zintl Compounds: Yb14MnSb11 and Yb14MnBi11

Julia Y. Chan, Marilyn M. Olmstead, Susan M. Kauzlarich, David J. Webb

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Abstract

Rare-earth transition metal compounds Yb14MnSb11 and Yb14MnBi11 have been prepared by heating stoichiometric amounts of the elements at 1000-1200°C. These compounds are isostructural with the Zintl compound Ca14AlSb11 and crystallize in the tetragonal space group I41/acd (Z = 8). Single-crystal X-ray data (143 K) were refined for Yb14MnSb11 [a = 16.615(2) Å, c = 21.948(4) Å, V = 6059(2) Å3, and R1/wR2 (0.0299/0.0479)] and Yb14MnBi11 [a = 17.000(3) Å, c = 22.259(6) Å, V = 6433(2) Å3, R1/wR2 (0.0631/0.133)]. Structural analysis is consistent with Yb2+. Temperature-dependent magnetic susceptibility data show that Yb14MnSb11 orders ferromagnetically at 56 K and Yb14MnBi11 has a ferromagnetic transition at 58 K and another transition at 28 K. High-temperature magnetic susceptibility data can be fit with a modified Curie-Weiss law and give μeff = 4.92(2)μB and μeff = 4.9(1)μB for the Sb and Bi compounds, respectively. This result is consistent with the assignment of Mn3+ (d4) and Yb2+ (f14). Single-crystal magnetic data provide additional evidence for the magnetic transitions and show that the compounds are magnetically anisotropic.

Original languageEnglish (US)
Pages (from-to)3583-3588
Number of pages6
JournalChemistry of Materials
Volume10
Issue number11
StatePublished - Nov 1998

ASJC Scopus subject areas

  • Materials Science(all)
  • Materials Chemistry

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    Chan, J. Y., Olmstead, M. M., Kauzlarich, S. M., & Webb, D. J. (1998). Structure and Ferromagnetism of the Rare-Earth Zintl Compounds: Yb14MnSb11 and Yb14MnBi11. Chemistry of Materials, 10(11), 3583-3588.