PROCESS TEMPERATURE-DEPENDENCE OF DELTA-M PLOTS ON CO ALLOY MEDIA ON AMORPHOUS-CARBON SUBSTRATES

The static magnetic properties and the film structure of Co alloy reco rding media made under different deposition and annealing temperatures were investigated. With increasing film coercivity an increase of the grain size and a reduction of the positive peak in the partial deriva tive M plots were observed. It is believed that reduced exchange coupl ing was achieved by preferential Cr segregation at the grain boundarie s during high-temperature processing.