Distribution of Jc in Rectangular-Shaped YBCO Films Prepared by MOD Using Various Coating Methods

12 cm-long rectangular MOD-YBa₂Cu₃O₇ (YBCO) films were prepared by MOD on R-plane sapphire substrates with an evaporated-CeO₂ buffer layer. The substrates were coated with a fluorine-free solution by two methods; spin coating and wire-bar coating. Distribution of inductive J_c of the spin-coated and wire-bar-coated Alms was investigated. In the inductive measurement of superconducting YBCO films, the data are presumed to be affected by film edges if the width is comparable to the diameter of the probe coil. However, the present results showed that the edge effect is less significant if the coil does not cross the film edges and that the inductive J_c agrees well with the transport J_c . YBCO films with high J_c were obtained by both the coating methods. At present, the J_c values and uniformity of J_c in YBCO films prepared by spin coating were higher than those by wire-bar coating.