EFFECTS OF ANNEALING CONDITIONS ON THE PHASE-STABILITY AND SUPERCONDUCTING PROPERTIES OF DC SPUTTERING TLBACACUO THIN-FILMS

Abstract

We have studied the influence of heat treatment on the properties of the superconducting transition and critical current on the TiBaCaCuO thin films prepared by DC sputtering. The superconducting transition temperature is increasing as the maximum annealing temperature is raised. The XRD analysis reveals the evolution of the major phase of the films from 2212 phase to 2223 phase, when the films were annealed at maximum temperature varied from 895-degrees-C to 922-degrees-C. The surface morphology of the sample reveals the formation of the intergrowth of grains by partial melting, which may associated with the evolution of cntical current for the annealed films.