Understanding the Asymmetry of the Critical Current Angular Dependence of Coated Conductors
摘要
The study focuses on analyzing the critical current angular dependencies of coated conductor samples that are sliced in both longitudinal and transverse directions of the tape. It is evident that in both cases, beside the dependence on magnetic field direction there is a distinct dependence of the critical current value on the direction of the Lorentz force that acting on the vortex matter. Asymmetry of the peaks is detected in the longitudinal sample, whereas this phenomenon is notably absent in the transverse sample. This is found to consist with the prevalent ab-plane tilt around the axis that coincides with the tape direction. An interpretation of this asymmetry is proposed that naturally follows from the empirically noted duality of the critical current anisotropy with respect to both the magnetic field and the Lorentz force directions. This analysis establishes, for the first time, a direct link between the ab-plane inclination angle and pinning characteristics, marking an advance in elucidating the structure–property relationship.