Characterization of thin films superconductor materials and study of electrical properties

Abstract

In the present work, Polycrystalline samples of Bi2-xPbxSr2CaCu2O8-δ were prepared using the traditional solid- state reaction method. The obtained powder was sintered at 870 oC to realize the bulk BSCCO-target of superconducting material. The preceding composite is the first superconductor with Tc above 100 °K. A thin film of Bi(Pb)-2212 is synthesized using the pulsed laser deposition technique (PLD). Many factors influence thin film properties and deposition effectiveness, including substrate nature and operating temperature, laser fluency, deposition time, oxygen pressure in the chamber, and post-growth annealing. As a result, we were able to create thin films on a variety of substrates using different laser energy density (5.57 and 6.3 J/cm2). The characteristics of a nanostructured BSCCO films were investigated, structurally by X-Ray Diffraction (XRD), which reveals that the films are crystalline with an orthorhombic phase, and morphologically by Scanning Electron Microscopy (SEM), which clearly shows that the film deposited has spherical grains. The I-V properties of BSCCO thin films were determined in the forward direction at room temperature. The results indicate that these films are of high quality, with epitaxial growth, as well as good electrical properties.