In order to achieve high irreversibility field (Birr), we fabricated (Nd, Eu, Gd)Ba2Cu3Oy (NEGBCO) thin films by pulsed laser deposition (PLD) method and low temperature growth (LTG) technique. In the LTG-NEGBCO films on MgO, critical current density (Jc) at 77 K and magnetic field B = 5 T was 0.13 MA/cm2 twice as high as that of PLD-NEGBCO/MgO and Birr at 77 K reached 11.8 T. Interestingly, the anomalous peaks on the Jc-B and Fp-B (flux pinning force density Fp = Jc × B) curves at 77 K and B = 4 T were observed on the LTG-NEGBCO/MgO films. From these results, we can consider that NEGBCO films are good candidates and LTG is an effective technique for improving superconducting properties.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering