57Fe Mössbauer investigations in the series Fe4−2xRuxSix(1.0≦x≦1.7)
57Fe Mössbauer and magnetization studies on a new series Fe4−2xRuxSix (1.0≦x≦1.7) are reported. The system is seen to transform from a collinear ferromagnet for x≦1.2 to a cluster spin glass for x>=1.54 In the intermediate region the magnetic behaviour of the system, as probed by the Mössbauer effect, is dominated by the presence of clusters and their dynamics. The alloys have large ordering temperatures (∼ 750 K) throughout the series except for x>1.54 where they drop sharply. The moment values, in contrast, fall sharply from 4.8μB at x=1 to 0.5μB at x=1.6C. The average value of the HF at57Fe measured at 15 K does not change significantly throughout the series.
KeywordsThin Film Spin Glass Magnetic Behaviour Intermediate Region Magnetization Study
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