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- Title
Influences of Ag doping on the high energy ball milling aided sintering FeSe superconductors.
- Authors
Zhang, Shengnan; Liu, Jixing; Feng, Jianqing; Shao, Botao; Li, Chengshan; Zhang, Pingxiang
- Abstract
FeSe and FeSe superconducting bulks were fabricated with high energy ball miling aided sintering process with different Ag nanoparticles addition. The influences of both Fe content and Ag addition on the phase composition, microstructures, critical temperature as well as the grain connectivity of these two systems have been systematically analyzed. It is noticed that with the increasing contents of both Fe and Ag addition, the content of non-superconducting hexagonal δ-FeSe phase decreased. The increasing superconducting phase volume ratio and critical temperatures were both confirmed by the magnetization measurements, which can be attributed to the Ag addition. On the other hand, the microstructures observation revealed the systematical change of texture structures and secondary phase contents, which was beneficial to the enhancement of intergrain connectivity. Therefore, the peak temperature on the imaginary component of AC susceptibility shifted towards higher temperatures with Ag addition, especially after a low oxygen atmosphere annealing process. The optimal superconducting properties were both obtained with 10 wt% Ag addition in FeSe and FeSe systems.
- Subjects
IRON selenides; SUPERCONDUCTORS; SINTERING; SILVER; DOPING agents (Chemistry); HIGH energy forming; ANNEALING of metals
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 2, p1018
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-017-8001-4