Abstract
Magnetic properties and thermal stability were studied in new antiferromagnetically coupled recording medium (AFC medium) with a CrMo spacer layer instead of the conventional Ru spacer Layer. It was found that a reduction of M_rt can be obtained in the new AFC medium with a CrMo spacer layer due to antiferromagnetic coupling similar to the conventional AFC medium with a Ru spacer layer. Also, the thermal stability factor, K_UV/k_BT for the proposed medium was slightly smaller than that of the conventional AFC medium with a Ru spacer layer, but larger than that of a single magnetic layer medium. From the results of SFD and ΔM, it is conjectured that the intergranular exchange coupling decreases when a CrMo is used as a spacer layer.
