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Updated: Feb 16, 2026

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Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
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在 (La0.5-xNa0.5+x) Fe2As2的孔 dop 侧的超导性
Akira Iyo1, Kenji Kawashima1,2, Shigeyuki Ishida1
1National Institute of Advanced Industrial Science and Technology (AIST) , 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan.
Journal of the American Chemical Society
|December 28, 2017
概括
研究人员合成了多晶体 (La,Na) 122个样本,在孔合材料中实现了散装超导. 这项研究探讨了这些铁基超导体的电子相图,发现最大的过渡温度为27.0K.
科学领域:
- 凝聚物质物理学
- 材料科学
- 超导性
背景情况:
- (La,Na) 122系统提供了一个独特的平台来研究Fe2As2层的电子和孔效应.
- 之前的合成工作仅限于x=0.1的非散装超导单晶,阻碍了全面的相图探索.
研究的目的:
- 合成多晶体 (La,Na) 122 样品,用于广泛的孔组合 (0 ≤ x ≤ 0.35).
- 调查散装超导的出现,并为 (La,Na) 122系统的孔 doped 侧构建电子相图.
- 解决合成电子合样本的挑战,并了解基于Fe的超导体中的电子孔对称性.
主要方法:
- 传统的固态反应技术,反应温度根据兴奋剂成分x仔细调整.
- 聚晶样本的合成用于从x=0到x=0.35的孔度.
- 电阻测量以确定与结构和磁性转换有关的超导转换和异常.
主要成果:
- 成功合成的 (La,Na) 122 的多晶样品,用于 0 ≤ x ≤ 0.35 的孔组合物.
- 观察到原始化合物中的电阻异常温度 (x = 0) 随着孔 doping 的增加而下降.
- 在0.15 ≤ x ≤ 0.35范围内发现的散装超导性,在x = 0.3时最大临界温度 (Tc) 为27.0K.
- 构建了 (La,Na) 122系统的电子相图.
结论:
- 通过优化温度,可以通过固态反应成功合成多晶体 (La,Na) 122样本.
- 在0.15 ≤ x ≤ 0.35的孔化 (La,Na) 122中实现了散装超导,表明显著的Tc为27.0K.
- 无法合成电子合样本凸显了不对称性,需要进一步研究以完成电子相图并探索电子孔对称性.
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