Enhanced flux pinning properties in Bi-2212 high temperature superconductors with nano-sized precipitates
Enhanced flux pinning properties in Bi-2212 high temperature superconductors with nano-sized precipitates
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纳米级沉淀物增强 Bi-2212 高温超导体的通量钉扎性能
DOI：
10.1016/j.matlet.2015.05.096
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发表时间：
2015-10
影响因子：
3
通讯作者：
张平祥
中科院分区：
文献类型：
--
作者：
张胜楠;梁明;李成山;郝清滨;冯建情;张平祥
采用放电等离子烧结（SPS）和随后的氧气退火工艺制备了含有大量纳米析出物的Al掺杂Bi-2212超导块材。由于Al掺杂的干扰，碱土金属铜酸盐（AEC，（Ca，Sr）xCuyOz）沉淀并形成均匀分布在Bi-2212基体中的纳米颗粒。系统地研究了这些沉淀物和Al掺杂对超导体的微观结构、输运和超导性能，特别是磁通钉扎性能的影响。随着析出相的出现，点磁通钉扎机制得到了明显的加强。这些纳米尺寸的沉淀物对磁场下Bi-2212块体中磁通钉扎性能的增强的作用已被证明是通过增加激活能和改善磁通钉扎力。
Al doped Bi-2212 superconducting bulks with large amounts of nano-sized precipitates have been fabricated by spark plasma sintering (SPS) and subsequent annealing under oxygen. Due to the interferences of Al doping, alkali earth cuprates (AEC, (Ca, Sr)xCuyOz) have precipitated and formed the nanoparticles distributed uniformly in the Bi-2212 matrix. The influences of these precipitates and Al doping on the microstructures, transport and superconducting properties, especially the flux pinning properties have been systematically investigated. The point flux pinning mechanism has been obviously enhanced with the appearance of precipitates. The effects of these nano-sized precipitates on the enhancements of flux pinning properties in Bi-2212 bulks under magnetic field have been proved by both the increased activation energy and the improved flux pinning force.
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DOI：
10.1016/0921-4534(95)00504-8
发表时间：
1995-11
影响因子：
1.7
作者：
P. Kazin;M. Jansen;Á. Larrea;G. F. Fuente;Y. Tret’yakov
通讯作者：
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影响因子：
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影响因子：
3.6
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通讯作者：
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影响因子：
2.1
作者：
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通讯作者：
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影响因子：
6.2
作者：
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