Magnetic Properties and Recording Charaeteristics of Partially Oxidized Fe-Co Medium

Magnetic properties of partially oxidized Fe-Co sputtered films are comparable to those of CoCr films. We studied the relationships between magnetic properties and recording characteristics, for the combination of a ring-type head and a single-layer medium. The recording density D50 increased in proportion to the anisotropy field Hk, and the reproduced voltage depended on the saturation magnetization 4¿Ms and the Co content. Maximum reproduced voltage was obtained in the 4¿Ms region of 8500 to 11,000 Gauss at 60 at% Co. On the basis of X-ray diffraction analyses of these films, it is thought that the reproduced voltage is related to the film microstructure.