COMPARISONS OF MEASURED AND CALCULATED ANGULAR DEPENDENCE OF COERCIVITY OF LONGITUDINAL CoCr/Cr THIN FILMS

Abstract

---With corrections for demagnetization fields in the direction of the applied external field, the effects of the easy axis distributions on the angular dependence of apparent coercivity for coherent rotation and incoherent curling and fanning rotations in longitudinal magnetic thin films are taken into account. for the thin film. Calculations are compared with the measurements for CoCr/Cr thin films by Lu et al [2]. It is shown that the curves of the angular dependence of apparent coercivity for 4000A CoCr/Cr thick films with or without 3000A Cr underlayer can be explained by the curling rotation process, and that a 3000A thick Cr underlayer induces a change of the micromagnetization reversal for 350A CoCr thin films from fanning to curling and an increase of the in-plane component of the easy axis distributions. It is also shown that all curves of the angular dependence of the apparent coercivity for CoCr/Cr films can be explained by components of effective in-plane isotropic and vertical-plane Gaussian easy axis distributions.