Measurement of the magneto-optical polar Kerr effect is performed on rare earth-transition metal (RE-TM) amorphous films using in-plane fields. From this measurement and the measurement of the saturation magnetization using a vibrating sample magnetometer (VSM), the magnetic anisotropy constants are determined. In this paper, we present the temperature dependence of the magnetic anisotropy in the range of -175 degree(s)C to 175 degree(s)C. The results show a dip in the anisotropy near magnetic compensation. This anomaly is explained based on the finite exchange coupling between the rare earth and transition metal subnetworks.
Magnetic force microscopy as a tool for characterization of magneto-optical recording media with submicron resolution is investigated. Experimental data are analyzed using a model which takes account of the micromagnetics of the needle.