Introducing multi-source pinning centers into Y–Ba–Cu–O superconductor through addition of BiFeO3 nano-particles
Introducing multi-source pinning centers into Y–Ba–Cu–O superconductor through addition of BiFeO3 nano-particles
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DOI：
10.1016/j.scriptamat.2017.01.023
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发表时间：
2017-04
影响因子：
6
通讯作者：
Guo-Zheng Li;Shouyu Wang;Jia-wei Li;Wanmin Yang
中科院分区：
文献类型：
--
作者：
Guo-Zheng Li;Shouyu Wang;Jia-wei Li;Wanmin Yang
采用粉末熔体渗透生长（PM-IG）技术在Y-Ba-Cu-O （YBCO）超导体中化学掺杂BiFeO3（BFO）纳米粒子。结果表明，掺0.2 wt%纳米bfo的样品的超导性能得到了改善。对掺5wt %纳米BFO的YBCO颗粒磨粉的x射线衍射（XRD）结果证实了PM-IG过程中BFO相的分解，形成了y2ba4cubiy （YBi-2411）相。因此，BFO的加入可以引入多源钉钉中心，即YBi-2411纳米级颗粒和Fe元素取代，这是超导性能改善的原因。
Chemical doping of BiFeO3(BFO) nano-particles in Y–Ba–Cu–O (YBCO) superconductor was performed using the powder melt and infiltration growth (PM-IG) technique. The results indicate that improved superconducting properties have been observed in 0.2 wt% nano-BFO doped sample. The X-ray diffraction (XRD) result performed on the ground powder of 5 wt% nano-BFO doped YBCO grain proves the decomposition of BFO phase during the PM-IG process and the formation of Y2Ba4CuBiOy(YBi-2411) phase. Consequently, the addition of BFO could introduce multi-source pinning centers, i.e. YBi-2411 nanoscale particles and Fe element substitutions, which accounts for the improvement in superconducting properties.