Vector Magnetization of Recording Media

Advanced magnetic recording media may be oriented with a preferred direction of magnetization in or out of the plane. The angular dependence of the magnetic properties of the media provides important information for determining the mechanism of magnetization reversal and for analyzing the recording process, since the head field incorporates parallel and perpendicular components in its interaction with the recording media. To obtain the intrinsic magnetic properties, it is necessary to compensate the demagnetizing fields, and for this purpose, we have added orthogonal biaxial detecting coils to our VSM for the simultaneous measurement of the vector magnetization components. In this paper, we report on vector magnetization measurements on most of the commonly used magnetic recording media, including SVHS, 8 mm video, CrO2, Ba-ferrite, Co-Ni-P thin film, and CoCr.