在优化的高温超导双层薄膜中提高了临界电流密度
E Rivasto1, M M Aye1,2, H Huhtinen1
1Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland.
Journal of physics. Condensed matter : an Institute of Physics journal
|December 15, 2023
概括
乙和铜氧化物 (YBCO) 和酸 (BZO) 的双层超导薄膜显示了增强的性能. 最佳结构显著优于单层,使它们成为下一代涂层导体的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 超导电性 超导电性 超导电性
背景情况:
- 高温超导体,如,,铜氧化物 (YBCO),对于先进的应用至关重要.
- 提高超导膜的性能是一个持续的挑战.
- 添加诸如氧化 (BZO) 等添加剂可以改变材料的性能.
研究的目的:
- 研究YBCO/YBCO+BZO双层薄膜的超导和结构性质.
- 为了确定最佳的组成和结构,以提高关键电流密度.
- 评估这些双层薄膜在下一代涂层导体中的潜力.
主要方法:
- 制造YBCO/YBCO+BZO双层薄膜. 这种薄膜的制造
- 在不同的磁场和温度下,结构和超导性能的表征.
- 两层薄膜性能与单层薄膜的比较.
主要成果:
- 确定了一个最佳的双层结构,在接口上有30%的YBCO,顶部有70%的YBCO+6%BZO.
- 与单层薄膜相比,最佳的双层薄膜显示了高达60%的临界电流密度改善.
- 这些发现与超导异构结构的既定理论框架一致.
结论:
- 双层工程提供了一种有效的方法来提高高温超导体的性能.
- 开发的双层薄膜为提高超导体的适用性提供了可行和实用的解决方案.
- 这些双层薄膜是未来涂层导体技术的强有力的候选者.
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