Inhomogeneities and basic magnetic properties in Fe-B glassy alloys

The manifestation of inhomogeneities in the mean magnetic moment per iron atom /spl mu//sub Fe/ and Curie temperature T/sub c/ of Fe-B glassy alloys is shown experimentally and explained on the basis of the simultaneous existence of compound-like associations and iron clusters. Experimental data show anomalous concentration dependence /spl mu//sub Fe/ and T/sub c/ in the low boron concentration range (c/sub B/<20 at%): T/sub c/ increases sad /spl mu//sub Fe/ shows a flat maxmin instead of monotonic decrease with increasing boron content. Cooling rate and melt overheat influence not only the T/sub c/-which is known to be structure dependent-but the magnetization as well. The sensitivity to structural changes of these two parameters can be interpreted by the exceptional behaviour of iron.<
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