Enhanced Pinning Properties of the Bilayers of YDy0.5Ba2Cu3O7-delta by SrZrO3 Nanoparticles through Low Fluorine Metallorganic Solution Deposition
Enhanced Pinning Properties of the Bilayers of YDy0.5Ba2Cu3O7-delta by SrZrO3 Nanoparticles through Low Fluorine Metallorganic Solution Deposition
复制标题
SrZrO3 纳米粒子通过低氟金属有机溶液沉积增强 YDy0.5Ba2Cu3O7-δ 双层的钉扎性能
DOI：
10.1007/s10948-017-4511-9
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发表时间：
2018
影响因子：
1.8
通讯作者：
Cai Chuanbing
中科院分区：
文献类型：
--
作者：
Boubeche Mebrouka;Li Minjuan;Liu Xuming;Shi Can;Lui Zhiyong;Bai Chuanyi;Guo Yanqun;Cai Chuanbing
采用金属有机沉积法沉积厚度约1μ的双层YDy0.5Ba2Cu3.6O7−δ超导薄膜，中间夹层为SrZrO3(SZO)和BaZrO3(BZO)第二相。对这些结构的详细生长机制以及不同温度和磁场范围（0-5 T）下的超导性能进行了研究。结构分析表明双层结构明显改变了YBCO的生长机制。 SZO中间层使薄膜表面变得光滑。超导性能的磁测量表明，当插入 SZO 和 BZO 中间层时，临界温度略有下降。这表明层界面处的应变效应不断增强。双层YDy0.5Ba2Cu3.6O7−δ在整个施加温度和磁场范围内的临界电流密度和钉扎力因插入SZO层而增强，而当引入BZO层时则降低。钉扎特性的增强可以通过层状 YDyBCO 超导体中的密集通量钉扎来解释；这一结果可能会进一步提高载流能力。
Bilayered YDy0.5Ba2Cu3.6O7−δsuperconducting films with a thickness of about 1μwere deposited by metallorganic deposition method, an interlayer of secondary phase of SrZrO3(SZO) and BaZrO3(BZO) were inserted. Detailed growth mechanism studies of these structures as well as superconducting properties in different temperatures and magnetic field range (0–5 T) were investigated. Structural analysis showed that bilayer structure changed clearly the growth mechanism of YBCO. The SZO interlayer smoothens the film surface. Magnetic measurements of superconducting properties demonstrated that the critical temperature decreases slightly when both of SZO and BZO interlayer were inserted. This indicates a growing strain effect at the layer interfaces. The critical current densities as well as pining forces of bilayered YDy0.5Ba2Cu3.6O7−δin the entire applied temperature and magnetic field range were enhanced by the insertion of SZO layer and decreased when BZO layer is introduced. The enhancement of the pinning properties is explained by the dense flux pinning in layered YDyBCO superconductors; this result may give further improvements in the current-carrying capability.