MAGNETIZATION CURRENT-DENSITY AND IRREVERSIBILITY LINE OF TL2BA2CACU2O8 SUPERCONDUCTING FILM

The magnetization loops M(T, H-a) and the irreversibility line H-irr(T ) of a epitaxial Tl2Ba2CaCu2O8 superconducting film have been measured . When the self-field effects of the. current (B) over right arrow' (r ) are considered, the field and temperature dependence of the magnetiz ation current density J(T, B) is obtained in a self-consistent way usi ng finite-element analysis, where (B) over right arrow(r) = mu(0) (H) over right arrow(a)+(B) over right arrow'(r).