PUlsed laser deposition of superconductor/ferromagnetic YBa_2Cu_3O_y/SrTiO_3/La_2/3Sr_1/3MnO_3 heterostructures

摘要

YBa_2Cu_3O_y/SrTiO_3/La_2/3Sr_1/3MnO_3 heterostructures have been deposited on LaAlO_3(001) and SrTiO_3(001) substrates by pulsed laser deposition. First, the influence of deposition conditions on crystallinity and morphology of single LSMO films was examined. results were used for preparation of heterostructures in tri-layer and cross-strip geometry. Cross-srip geometry was defined by direct shadow mask patterning. Different characterization techniques have been used to determine and correlate the heterostructure properties. A complete analysis of the crystal structure has been carried out with a four-circle difractometer. morphology has been studied by scanning electron microscopy and atomic force microscopy in order to determine surface roughness and droplet density. Basic electrical properties of films have been determined.