Abstract
The Curie temperature of a disordered alloy may differ from that of a partially ordered system. Alternatively, magnetism can influence chemical order and produce substantial changes in the phase diagram. These results have been established by a detailed investigation of the Col-xPtx system and the entire phase diagram, including magnetic and chemical effects, have been calculated and shown to be in good agreement with experimental data. In addition, ultrathin multilayers of Co/Pt show perpendicular anisotropy but the origin of this unique property is not well understood. Recently, we have shown that the d-electron density of states of a range of Cul-xPdx alloys, based on measurements of L3,2 transitions (“white lines” - WL) in electron energy-loss spectroscopy (EELS), is critically dependent on short-range order (SRO). In this paper we present results of the combined effect of magnetic and chemical order on the d -hole count, as measured by the normalized Co WL intensities, in four different Co/Pt alloys.
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