Superconductivity at 35.5 K in K-Doped CaFe2As2

被引：13

作者：

Wang, D. M. ^{[1
]}

Shangguan, X. C. ^{[1
]}

He, J. B. ^{[1
]}

Zhao, L. X. ^{[1
]}

Long, Y. J. ^{[1
]}

Wang, P. P. ^{[2
,3
]}

Wang, L. ^{[1
]}

机构：

[1] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2013年 / 26卷 / 06期

关键词：

Pnictides; Hole-doped; Critical fields; Substitution;

D O I：

10.1007/s10948-013-2169-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the successful synthesis of a new iron-based 122-family superconductor K-doped CaFe2As2. The temperature dependence of resistivity shows a sharp superconducting transition at similar to 35.5 K, which is the highest value among the hole-doped CaFe2As2 superconductors reported so far. A superconducting volume fraction of similar to 100 % at 2.5 K is calculated from the diamagnetic signal, which confirms the bulk superconductivity characteristic of the sample. The measurement of resistivity under different magnetic fields gives very large upper critical fields and a small anisotropy parameter, which are consistent with that of the other 122 superconductors.

引用

页码：2121 / 2124

页数：4

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