CROSSOVER BETWEEN FRACTAL AND NONFRACTAL FLUX-PENETRATION IN HIGH-TEMPERATURE SUPERCONDUCTING THIN-FILMS

Authors
SURDEANU R WIJNGAARDEN RJ DAM B RECTOR J GRIESSEN R ROSSEL C REN ZF WANG JH
Citation
R. Surdeanu et al., CROSSOVER BETWEEN FRACTAL AND NONFRACTAL FLUX-PENETRATION IN HIGH-TEMPERATURE SUPERCONDUCTING THIN-FILMS, Physical review. B, Condensed matter, 58(18), 1998, pp. 12467-12477
Citations number
47
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
58
Issue
18
Year of publication
1998
Pages
12467 - 12477
Database
ISI
SICI code
0163-1829(1998)58:18<12467:CBFANF>2.0.ZU;2-4
Abstract
In this study the role of anisotropy on flux penetration in c-axis epi taxial Tl2Ba2CuO6+x and YBa2Cu3O7-x films is investigated by magneto-o ptics. 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 d egrees and YBa2Cu3O7-x films as a function of chain-conduction-induced anisotropy. A crossover from fractal to nonfractal flux penetration i s observed with increasing anisotropy. Numerical simulations of anisot ropic flux motion are compared with experiment. [S0163-1829(98)05742-7 ].