Abstract
Abstract We present calculations of the structural, electronic and magnetic properties of amorphous FeY and CoY alloys. We show that over a wide range of compositions both a-FeY and a-CoY are ferrimagnetic, but with some significant differences: a-CoY retains a simple collinear magnetic structure, but the disorder-induced broadening of the d-band leads to enhanced magnetism. In Fe-rich a-FeY alloys competing exchange interactions lead to complex spin structures.
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