Abstract: The Y_0.5Gd_0.5BCO film was successfully fabricated by fluorine-reduced MOD method through dissolving Gd(CH₃COO)₃ into the precursor solution. As a result, Y was partially substituted by Gd and all the films have well c-axis orientation. By comparing the superconducting properties, it is found that the Y_0.5Gd_0.5BCO film has lower critical transition temperature Tc (90.5K) than that of the pure YBCO and GdBCO films. Yet the Y_0.5Gd_0.5BCO film has the highest critical current density Jc value about 4.87MA/cm² at 65K and self-field. In addition, the Jc value of Y_0.5Gd_0.5BCO film is enhanced significantly as increasing the applied magnetic field. The Jc value of Y_0.5Gd_0.5BCO film is 1.8 times and 5.1 times of that of the pure GdBCO and YBCO films at 65K and 3T applied field, respectively. Furthermore, the pinning force of the Y_0.5Gd_0.5BCO film is effectively improved by the elemental substitutions.

Key words: YBCO film, elemental substitutions, fluorine-reduced MOD, field-property