LAUSR

Abstract We found a non-cos2β angular-dependent magnetoresistance (ADMR) of the face-centered-cubic Co thin films on MgO (001) substrates, where β is the angle between applied magnetic field H and current I. Such angular dependence comes from the fact that the magnetization M cannot be completely saturated in coherent rotation mechanism when H deviates from the direction of easy and hard axes. By taking advantage of the Taylor's series, analytical expressions of the ADMR were derived for both out-of-plane and in-plane configuration. When H is larger than 2 times anisotropic field, the expressions can describe the magnetization-induced ADMR very well, where the maximum error at different angles is less than 5%. The non-cos2β characteristic of the ADMR is helpful to distinguish the contribution of magnetization from others.