Multilayered deposition and its role in the enhancement of YBa2Cu3O7 film performance

Abstract

The enhancement of the critical current density (Jc) has been achieved by introducing (Y/Nd)Ba2Cu3O7 [(Y/Nd)BCO] multilayered structure into relatively thick films (∼1000 nm) produced by pulsed-laser deposition. The microstructure of the multilayered systems obtained has been shown to improve from the bottom to the top layers, producing dislocations at the interfaces. The (Y/Y)BCO single-element multilayered deposition is also shown to comparably increase Jc, which is attributed to the extended time of particle mobility creating "multilayered" interfaces and acting in a similar way as for the (Y/Nd)BCO interfaces. © 2007 Elsevier B.V. All rights reserved.