Novel quantitative MFM technique to study orientation ratio in longitudinal recording media

A quantitative MFM technique to determine the magnetic orientation in longi tudinal media at the microscopic level is described. The remanent magnetiza tion orientation ratio measured by this MFM technique correlates well with the orientation ratio measured using a VSM. The analysis used to determine the orientation ratio from MFM images is based on the disorder noise model. The experimental results show that orientation is reflected in medium nois e and interaction effects, as measured using the delta hi technique.