Flux growth of Yb6.6Ir6Sn16 having mixed-valent ytterbium

Sebastian C. Peter, Udumula Subbarao, Sudhindra Rayaprol, Joshua B. Martin, Mahalingam Balasubramanian, Christos D. Malliakas, Mercouri G. Kanatzidis

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Abstract

The compound Yb6.6Ir6Sn16 was obtained as single crystals in high yield from the reaction of Yb with Ir and Sn run in excess indium. Single-crystal X-ray diffraction analysis shows that Yb 6.6Ir6Sn16 crystallizes in the tetragonal space group P42/nmc with a = b = 9.7105(7) Å and c = 13.7183(11) Å. The crystal structure is composed of a [Ir6Sn16] polyanionic network with cages in which the Yb atoms are embedded. The Yb sublattice features extensive vacancies on one crystallographic site. Magnetic susceptibility measurements on single crystals indicate Curie-Weiss law behavior <100 K with no magnetic ordering down to 2 K. The magnetic moment within the linear region (<100 K) is 3.21 μB/Yb, which is ∼70% of the expected value for a free Yb3+ ion suggesting the presence of mixed-valent ytterbium atoms. X-ray absorption near edge spectroscopy confirms that Yb6.6Ir6Sn16 exhibits mixed valence. Resistivity and heat capacity measurements for Yb6.6Ir 6Sn16 indicate non-Fermi liquid metallic behavior.

Original languageEnglish
Pages (from-to)6615-6623
Number of pages9
JournalInorganic Chemistry
Volume53
Issue number13
DOIs
Publication statusPublished - Jul 7 2014

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

Peter, S. C., Subbarao, U., Rayaprol, S., Martin, J. B., Balasubramanian, M., Malliakas, C. D., & Kanatzidis, M. G. (2014). Flux growth of Yb6.6Ir6Sn16 having mixed-valent ytterbium. Inorganic Chemistry, 53(13), 6615-6623. https://doi.org/10.1021/ic500204t