Abstract
CeO2/La2Zr2O7 composite buffer layers were deposited on Ni-W tapes using chemical solution method. YBa2Cu3O7-x (YBCO) films were then deposited on the CeO2/La2Zr2O7 composite buffer layers using a low-fluorine solution route. Effect of the annealing temperature and annealing atmosphere on the texture of the CeO2 layers was investigated. It was found that CeO2 film annealed at 1000°C under the atmosphere of N2 containing of 5vol. %H2 shows a high degree of c-orientation on La2Zr2O7 (LZO) film. Effect of oxygen partial pressure on the properties of YBCO films deposited on the CeO2/LZO buffer layers was also investigated. The YBCO annealed under N2 containing of 500ppm O2 shows the optimal properties, with critical current density (Jc) of 1MA/cm2 at 77K, 0T.
Highlights
High temperature superconducting (HTS) coated conductors based on YBa2Cu3O7-x (YBCO) films are being developed due to its potential of power and energy applications [1]
We reported the Chemical solution deposition (CSD) preparation of the CeO2/LZO buffer layer and YBCO layer on the Ni-W tapes
The YBCO films were prepared on the CeO2/LZO buffer layers using a low-fluorine solution and annealed under different atmosphere
Summary
High temperature superconducting (HTS) coated conductors based on YBa2Cu3O7-x (YBCO) films are being developed due to its potential of power and energy applications [1]. It was found that combination of CeO2 with LZO, namely the CeO2/LZO composite buffer layer, can induce high-performance YBCO coated conductors [8]. The chemical solution deposition of both the CeO2/LZO buffer layer and YBCO superconducting layer on the Ni-W tape is still a challenge. We reported the CSD preparation of the CeO2/LZO buffer layer and YBCO layer on the Ni-W tapes.
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