Abstract
Results of X-ray, neutron diffraction, magnetization and Mössbauer measurements with circularly polarised beam on polycrystalline samples of the ternary intermetallic alloys UFe 4− x Al 8+ x with x in the range (−0.4, 0.4) are presented. The alloys crystallise in the structure of ThMn 12 type, belonging to the space group I4/mmm (no. 139). X-ray and neutron diffraction confirmed the phase homogeneity of all samples but that one with 4− x=4.4. Monochromatic Circularly Polarised Mössbauer Source (MCPMS) measurements reveal spin-canted magnetic structures in randomly oriented powders exposed to a field of 1 T at T=12 K. Magnetization measurements in an external field of 0.01 T allowed disclosing ferromagnetic-like behaviour vs. temperature and quite dissimilar magnetization and hysteresis curves against the fields in the alloys of interest.
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