Measurement of Magnetic Anisotropy Distribution of a Magneto-Optical Disk by the Hall Method

The Hall loops of nine square film samples (each size 7 × 7 mm
²
) cut out along the radius of a magneto-optical disk, were measured under an obliquely-applied magnetic field (H). These measurements indicated that the film magnetization was not completely perpendicular to the film plane, and that the tilt angle of magnetization increased toward the outer edge of the disk.