@article{oai:nagoya.repo.nii.ac.jp:00005194, author = {Ichino, Y. and Honda, R. and Miura, M. and Itoh, M. and Yoshida, Y. and Takai, Y. and Matsumoto, K. and Mukaida, M. and Ichinose, A.}, issue = {2}, journal = {IEEE Transactions on Applied Superconductivity}, month = {Jun}, note = {A-axis oriented epitaxial REBa2Cu3Oy (RE123) thin film performs excellent superconducting properties in magnetic field. Recently, we reported that a critical current density (Jc) in the RE123 thin film was improved by a deliberate composition control. A Sm1+x Ba2-xCu3Oy (Sm123) thin film with a small amount of Sm/Ba substitution x showed the great Jc ~ 0.17 MA cm2 in 5 T at 77.3 K, while the Jc in (Yb1 Nd )Ba2Cu3Oy (Yb/Nd123) thin films depended on an amount of mixed crystal ratio . In this report, we studied Jc as a function of magnetic field and field orientation with respect to ab-planes. In low magnetic field, the Jc of Sm123 thin film was almost independent of the applied angle of the field. In the case of Yb/Nd123 thin film, extremely high Jc were observed when the magnetic field was aligned parallel or perpendicular to the surface of the film. Because compositional fluctuations in RE123 thin films were observed by transmission electron microscopy, we found that the pinning centers in RE123 thin films are strongly affected by the composition in the thin films.}, pages = {3730--3733}, title = {Microstructure and field angle dependence of critical current densities in REBa/sub 2/Cu/sub 3/O/sub y/ thin films prepared by PLD method}, volume = {15}, year = {2005} }