ELECTRONIC MECHANISMS FOR MAGNETIC-INTERACTIONS IN A CU-MN SPIN-GLASS

We use our <<first-principles>> theory for magnetic correlations in pa ramagnetic alloys to extract magnetic interactions in the Cu85Mn15 <<s pin-glass>> alloy at 295 K. We associate a new combination of competin g, electronic effects for these entities. Our results are in good agre ement with appropriate neutron scattering data for this alloy above it s <<spin-freezing. temperature. We suggest that the extracted magnetic interactions will be useful in improving models of the low-temperatur e magnetic properties of these spin-glasses.