PHOTOEMISSION AND ELECTRONIC-STRUCTURE OF CRYSTALLINE CO3B AND AMORPHOUS COPB

We present an XPS and UPS study of crystalline Co, Co3B and Co78P14B8 glassy metal. For Co3B the electronic distribution curves (EDC) of the valence band and the previous specific heat and magnetic results are interpreted in a qualitative model where : i) the s-p cobalt-boron bonding states lie in the low part of the band, the upper levels being mainly cobalt d states and ii) a large density of states of the majority spin band is present at the Fermi level. For amorphous Co78P14B8 the EDC shows that EF is located in a high density of states region, it is suggested that the phosphorus p states ae centred at 7.5 eV. The photoemission and the magnetic results can be also interpreted in the framework of the previous model. © 1979.