Compensation for the Demagnetizing Field in Remanence Measurements of Perpendicular Magnetic Recording Films

Abstract

Remanence measurements are very useful for estimating the characteristics of intergranular magnetic interactions in recording layers. However, it is necessary to compensate for the demagnetizing field in remanence measurements of perpendicular magnetic recording films. In this study, a new method of compensating for the demagnetizing field is proposed and an effective reverse field H_eff is used to evaluate the dc demagnetization measurements, isothermal remanent magnetization measurements, and ΔM for perpendicular magnetic recording films.