In order to improve a critical current density (Jc) under applied magnetic fields, an addition of BaMO3 (BMO; M = Zr, Sn) nanorods into REBa2Cu3Oy (REBCO) films is actively discussed. Although superconducting properties of the REBCO films are dramatically enhanced by self-assembled BMO nanorods, the growth mechanisms of the BMO nanorods have not been clarified yet. In this study, in order to clarify the growth mechanisms of the BZrO3 (BZO) nanorods and to further improve the superconducting properties, we fabricated a BZO-doped Sm1+xBa2-xCu3Oy (Sm+BZO) film by using modified Vapor-Liquid-Solid (VLS) technique (VLS-Sm+BZO/i). The in-field Jc of the VLS-Sm+BZO/i film showed 4.5 times higher than that of Sm+BZO film fabricated by conventional pulsed laser deposition method (PLD-Sm+BZO) at B = 4 T and the Jc-B-θ curves of the VLS-Sm+BZO/i film was higher than that of the PLD-Sm+BZO film around the applied field angle of 40° against the c-axis of the SmBCO. From a TEM observation, we found that the BZO nanorods of VLS-Sm+BZO/i film grew discontinuously along the c-axis of the SmBCO.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering