Thick c-oriented films of single-phase Bi2SrzCaCu20, were prepared on (100) MgO substrates by employing a partial melting method. The effect of quenching on T,, was studied. The highest T,o obtained by resistance measurement was 92 K, whereas 93.2 K was achieved by AC susceptibility measurements. The best results for the critical current density Jc, measured in zero magnetic field, were 1.3 x lo3 A Near Tc the temperature dependence of Jc can be described by Jc -(1 -TITo)'.At temperatures T << To the dependence of Jc on temperature can be described by a homogeneous superconductor flux creep model. at 77 K and 7 x lo3 A c m 2 at 53 K.

No abstract

No abstract

No abstract

No abstract