Thick REBaCuO superconducting films through single-coating of low-fluorine metallorganic solution

Abstract

A high critical current Ic is crucial for the application of high temperature superconductors YBa2Cu3O7-δ in energy efficient power devices and wires.In this paper we report the fabrication of thick (YGd)1.3Ba2Cu3O7−x films on a metal substrate using low-fluorine metal organic deposition method. The effects of the film thickness on the microstructure, texture and superconductivity properties of the films were evaluated. In order to increase the film thicknesses by single coating, the influence of withdrawal speed during the dip coating on resulting thickness are investigated with the other processing parameters fixed. It is revealed that there is a maximum thickness for a certain starting solution. Here we used 3 different solutions, Conventional Low Fluorine solutions with 2M and 2.5M, and super low-fluorine solution with 2.5M. The maximum thicknesses of about 710nm, 1280nm and 1460nm were obtained, respectively.