Structural and physical properties of UFe10Mo2


Goncalves, A. P., Estrela, P., Waerenborgh, J. C., Godinho, M., Almeida, M. and Spirlet, J. C., 1995. Structural and physical properties of UFe10Mo2. Journal of Alloys and Compounds, 218 (2), pp. 183-189.

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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.


Item Type Articles
CreatorsGoncalves, A. P., Estrela, P., Waerenborgh, J. C., Godinho, M., Almeida, M. and Spirlet, J. C.
Uncontrolled Keywordscrystallization, magnetic variables measurement, magnetization, uranium alloys, ferromagnetism, x ray crystallography, crystal structure, stoichiometry, mossbauer spectroscopy, intermetallics, magnetic anisotropy, composition
DepartmentsFaculty of Engineering & Design > Electronic & Electrical Engineering
ID Code12148


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