1. High upper critical fields of superconducting Ca10(Pt4As8)(Fe1.8Pt0.2As2)5 whiskers.
- Author
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Jun Li, Gufei Zhang, Wei Hu, Ya Huang, Min Ji, Han-Cong Sun, Xian-Jing Zhou, De-Yue An, Lu-Yao Hao, Qiang Zhu, Jie Yuan, Kui Jin, Hong-Xuan Guo, Daisuke Fujita, Takeshi Hatano, Kazunari Yamaura, Takayama-Muromachi, Eiji, Hua-Bing Wang, Pei-Heng Wu, and Vanacken, Johan
- Subjects
SUPERCONDUCTORS ,METALLIC whiskers ,CALCIUM alloys ,PLATINUM alloys ,IRON alloys ,ARSENIDES ,CRYSTAL grain boundaries ,ELECTRIC conductivity - Abstract
We investigated the upper critical fields of Ca
10 (Pt4 As8 )(Fe1.8 Pt0.2 As2 )5 superconducting whiskers. The whiskers consist of several wire-like grains with diameter of around 200 nm, joined by grain boundaries whose misorientation angles are less than 5°. The upper critical fields along c-axis and in ab-plane were observed as 49 T at 12K and 50 T at 22K, respectively, which can be extrapolated to 81 and ~133 T at 0 K. The whisker demonstrated weak anisotropic factor and almost constant value of ~2 below 15 K. The impressive transport properties of the whisker may find applications in fields like superconducting micro- and meso-structure systems. [ABSTRACT FROM AUTHOR]- Published
- 2015
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