RESISTIVE TRANSITIONS UNDER HIGH MAGNETIC-FIELDS IN BI2SR2CACU2OY BI2SR2CUOX MULTILAYER THIN-FILMS/

This paper is a report on the results of a study done on the supercond uctive transitions of Bi2Sr2CaCu2Oy/Bi2Sr2CuOx (BSCCO/BSCO) multilayer thin films in magnetic fields parallel or perpendicular to the films, which were prepared using a multitarget rf magnetron sputtering techn ique. In the multilayers with BSCCO (a superconductor) of constant nom inal layer thickness of 47 angstrom, the resistive transition showed b roadening and reduction of T(c) with an increase of the BSCO (a nonsup erconductor) layer thickness from 36 angstrom to 144 angstrom. The res istive transition showed a slight broadening, even under the aligned m agnetic field parallel to the Cu-O planes. This result suggests that t he superconductive layers are coupled through BSCO layers, and that th e interlayer coupling was induced by the proximity effect.