Abstract
Microstructural characterisation, by means of energy dispersive X-ray microanalysis and X-ray diffraction of a Dy3Fe27.5Ti1.4 alloy annealed at 960°C for 7 days, has revealed the existence of a novel compound having the recently reported monoclinic Nd3(Fe,Ti)29-type structure. Thermogravimetric analysis (TGA) gives a magnetic ordering temperature of 438 K. Refinement of powder X-ray diffraction data by using the P21/c (a = 10.5759 A, b = 8.4962 A, c = 9.6704 A and β = 97.0472°) and A2/m (a = 10.5759 A, b = 8.4958 A, c = 9.6697 A and β = 97.0416°) space groups yields reliability R factors of 10.4% and 9.8% respectively. 57Fe Mossbauer spectroscopy measurements at room temperature yield an average 57Fe magnetic hyperfine field of 19.9(2) T, which corresponds to an average Fe magnetic moment of 1.3 μB.
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