부산대학교 도서관

${\rm YBa}_{2}{\rm Cu}_{3}{\rm O}_{7-\delta}$ (YBCO) films with Zr doping have been prepared successfully by the trifluoroacetate metal-organic deposition (TFA-MOD) method through dissolving Zr acetylacetonate into the precursor solution. Yttria-stabilized zirconia(YSZ)nanoparticles were detected in the doped YBCO films by XRD. From the analysis of XRD $\omega$ and $\varphi$ scans, the doped films have better out-of-plane and in-plane textures than those of the un-doped YBCO film. Although the doped YBCO films have lower $T_{\rm c}$ than that of the un-doped YBCO film, a very significant enhancement of normalized $J_{\rm c}$ is displayed as compared to the undoped film at applied fields, indicating that an effective pinning force was created by Zr doping.