Origin of the irreversibility line in thin YBa2Cu3O7-delta films with and without columnar defects

Article

关键词: HIGH-TEMPERATURE SUPERCONDUCTORS;    HIGH-TC SUPERCONDUCTORS;    BA-CU-O;    VORTEX-GLASS TRANSITION;    SINGLE-CRYSTALS;    FLUX LATTICE;    ANISOTROPIC SUPERCONDUCTORS;    BOSON LOCALIZATION;    BI2SR2CACU2O8 CRYSTALS;    CORRELATED DISORDER;   

DOI  :  10.1103/PhysRevB.54.15530

来源: SCIE

【 摘 要 】

We report on measurements of the angular dependence of the irreversibility temperature T-irr(theta) in YB2Cu3O7-delta thin films, defined by the onset of a third-harmonic signal and measured by a miniature Hall probe. From the functional form of T-irr(theta) we conclude that the origin of the irreversibility line in unirradiated films is a dynamic crossover from an unpinned to a pinned vortex liquid. In irradiated films the irreversibility temperature is determined by the trapping angle.

【 授权许可】

Free