Electronic structure calculations for amorphous Co and Ni

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Abstract
Self-consistent electronic structure calculations were performed for amorphous Co and Ni metals using the most localized linear muffin-tin orbital method together with the recursion method. The calculated results for the paramagnetic states suggest that these metals exhibit ferromagnetism according to the Stoner criterion. Spin-polarized calculations were also performed. The resultant magnetic moments were 1.63 mu B for amorphous Co, and 0.61 mu B for amorphous Ni. These values agree well with the experimental values obtained by extrapolation to the pure amorphous limit in several Co or Ni-based amorphous alloys. The stability of ferromagnetism is discussed for both the amorphous metals on the basis of the electronic structures obtained.