Synthesis and magnetic properties of (Ba,Bi)1.54Rh 8O16 hollandite

T. Klimczuk, Wei Li Lee, H. W. Zandbergen, R. J. Cava

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11 Scopus citations

Abstract

The synthesis, structure and electrical and magnetic properties of (Ba,Bi)1.54Rh8O16 hollandite are discussed. The addition of Bi stabilizes the Ba-Rh hollandite, otherwise not found under our synthesis conditions. The compound crystallizes in the monoclinic space group I2/m, a = 9.425(5) Å, b = 10.425(4) Å, c = 3.160(1) Å, γ = 94.11(5). Electron diffraction and structure imaging show that the (Ba,Bi) columns along the tunnels are incommensurate with the Rh8O 16 framework, and analysis of the electron diffraction and elemental analysis allow the formula to be determined as Ba1.21Bi 0.33Rh8O16. The compound shows Curie-Weiss paramagnetism, and we compare its susceptibility to that of Rh2O 3. Polycrystalline samples show a negative dρ/dT between 0.3 and 300K. No superconductivity is observed down to 0.3K.

Original languageEnglish (US)
Pages (from-to)1671-1677
Number of pages7
JournalMaterials Research Bulletin
Volume39
Issue number11
DOIs
StatePublished - Sep 1 2004

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • A. Oxides
  • B. Chemical synthesis
  • C. Electron diffraction
  • D. Electrical properties
  • D. Magnetic properties

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