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Abstract
Amorphous alloys of the form Fe79SnB20−xSix (x=0,2,5,9,12) were prepared by quenching from the melt. The crystallization was characterized by differential thermal analysis (DTA) measurements. Alloys with x=0 and x=2 show single DTA peaks at 450°and 475 °C, respectively. Alloys with x≥5 show two DTA peaks corresponding to the crystallization of Fe–Si phases at a lower temperature and Fe–B phases at a higher temperature. Magnetization measurements yield magnetic moments on the Fe ions which increase from 1.87μB in Fe79SnB20 to 1.97μB in Fe79SnB8Si12. Mössbauer effect measurements give values of the Fe and Sn hyperfine fields of approximately 285 k and +29 kOe, respectively, which are essentially independent of x. The width of the field distribution for both sites is found to remain nearly constant across the series as well.
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