A multilayer alternately stacked a-axis oriented YBa 2 Cu 3 O 7-δ and PrBa 2 Cu 3 O 7-δ (Y123/Pr123 multilayer) has been grown on a SrLaGaO 4 substrate with a Gd 2 CuO 4 buffer layer by pulsed laser deposition. We used an Y123 target that contains a Pr123 sector for obtaining the Y123/Pr123 multilayer. The multilayer structure of the obtained film was confirmed by a transmission electron microscope. In magnetic field (B) angular dependences of critical current density (J C ) (J C -B-θ curves), J C peaks were observed at B∥a-axis and B∥c-axis of the Y123/Pr123 multilayer. Peaks at B∥c-axis are absent in J C -B-θ curves of pure a-axis oriented Y123 films. Therefore, peaks at B∥c-axis in J C -B-θ curves of the Y123/Pr123 multilayer are attributed to Pr123 layers. This result indicates that the Y123/Pr123 multilayer has c-axis-correlated pinning centers. Consequently, it is concluded that Pr123 layers work as two-dimensional artificial pinning centers with the current direction along the b-axis.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering