Crossover between fractal and nonfractal flux penetration in high-temperature superconducting thin films

Article

关键词: MAGNETIC-FLUX;    YBA2CU3O7-DELTA FILMS;    FLAT SUPERCONDUCTORS;    ANISOTROPIC SUPERCONDUCTORS;    TRANSPORT-PROPERTIES;    INPLANE ANISOTROPY;    SINGLE-CRYSTALS;    CURRENT FLOW;    TL2BA2CUO6+DELTA;    DEFECTS;   

DOI  :  10.1103/PhysRevB.58.12467

来源: SCIE

【 摘 要 】

In this study the role of anisotropy on flux penetration in c-axis epitaxial Tl2Ba2CuO6+x and YBa2Cu3O7-x films is investigated by magneto-optics. We study thin films of Tl2Ba2CuO6+x on substrates with vicinal angles of 0 degrees (well-oriented), 0.5 degrees, 2.5 degrees, and 4 degrees and YBa2Cu3O7-x films as a function of chain-conduction-induced anisotropy. A crossover from fractal to nonfractal flux penetration is observed with increasing anisotropy. Numerical simulations of anisotropic flux motion are compared with experiment. [S0163-1829(98)05742-7].

【 授权许可】

Free