Abstract
Absolute electrical resistivity of amorphous Co80−xMnxB20 ribbons has been measured. The objective was to study the effects on electron transport of the appearance near the Fermi level EF of Mn d states. The most striking result is that the resistivity does not increase smoothly upon increasing x. The data are interpreted in terms of cluster calculations which confirm the appearance at EF of early transition metal d states which are strongly admixed with the boron p states. Electrical conduction in the presence of these p–d hybrids differs markedly from that due to s- or d-like states in a transition metal alloy without metalloids.
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