Pulsed Laser Deposition of Superconductor/Ferromagnetic YBa₂Cu₃O_y/SrTiO₃/La_2/3Sr_1/3MnO₃ Heterostructures

Abstract

YBa 2 Cu 3 Oy/SrTiO 3 /La2/ 3 Srl/ 3 MnO 3 heterostructures have been deposited on LaAIO 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-strip 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.