Abstract
An effective-medium (HF-cluster-CPA) theory by Miwa and the present author to study the local-environment effect in ferromagnetic transition-metal alloys is extended in a phenomenological way to treat an effect of s and p states in a certain group of alloys of transition metals with non-transition metals. The theory is applied to Ni-Cu alloys where, like Fe-V alloys discussed in a previous article, a local-environment effect is substantial; the HF-cluster-CPA improves a single-site HF-CPA even in the bulk magnetic property, e.g. , the spontaneous magnetization. An interpretation is also given to a qualitative difference in the property of the atomic magnetic moment between Ni in Ni-Cu and Fe in Fe-V.
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