Structural and physical properties of UFe10Mo2

A P Goncalves, Pedro Estrela, J C Waerenborgh, M Godinho, M Almeida, J C Spirlet

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Abstract

UFe10Mo2 was obtained as single-phase polycrystalline material by annealing at 1450 K a polyphasic sample prepared by melting the elements. This compound was characterized by single-crystal X-ray diffraction, 57Fe Mossbauer spectroscopy and magnetization measurements. UFe10Mo2 was found to crystallize in the space group I4/mmm with cell parameters a=8.4859(3) angstrom, c=4.7508(2) angstrom, V=342.103(21) angstrom3, Z=2 and a ThMn12-type structure that was solved by single-crystal X-ray diffraction to a final R=0.0345 (wR=0.0372). The Mo atoms are randomly distributed in the 8i positions. Magnetization measurements show a ferromagnetic-like behaviour for T<198 K and, in free powder, a saturation magnetization at low temperature of 8.8 μB per formula unit. Comparison with fixed powder measurements indicates a basal plane type of anisotropy. 57Fe Mossbauer spectra below Tc show a distribution of hyperfine fields from 0 to 20 T. This distribution was analysed considering the different local configurations around each Fe atom and assuming the Fe site distribution deduced from X-ray data.
Original languageEnglish
Pages (from-to)183-189
Number of pages7
JournalJournal of Alloys and Compounds
Volume218
Issue number2
DOIs
Publication statusPublished - 1995

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Keywords

  • Crystallization
  • Magnetic variables measurement
  • Magnetization
  • Uranium alloys
  • Ferromagnetism
  • X ray crystallography
  • Crystal structure
  • Stoichiometry
  • Mossbauer spectroscopy
  • Intermetallics
  • Magnetic anisotropy
  • Composition

Cite this

Goncalves, A. P., Estrela, P., Waerenborgh, J. C., Godinho, M., Almeida, M., & Spirlet, J. C. (1995). Structural and physical properties of UFe10Mo2. Journal of Alloys and Compounds, 218(2), 183-189. https://doi.org/10.1016/0925-8388(94)01403-5