Superconductivity and magnetic properties of single crystals of K0.75Fe1.66Se2 and Cs0.81Fe1.61Se2

被引：93

作者：

Ying, J. J. ^{[1
]}

Wang, X. F.

Luo, X. G.

Wang, A. F.

Zhang, M.

Yan, Y. J.

Xiang, Z. J.

Liu, R. H.

Cheng, P.

Ye, G. J.

Chen, X. H.

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 21期

关键词：

TEMPERATURE; PHASE; SPIN;

D O I：

10.1103/PhysRevB.83.212502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We successfully grew the high-quality single crystals of A(x)Fe(2)Se(2) (A = K and Cs) by self-flux method. Sharp superconducting transition was observed for both types of crystals. The crystals show the onset superconducting transition temperatures (T-c) of 31 and 30 K for K and Cs compounds, respectively, with nearly 100% superconductive shielding fraction. The crystals show quite high resistivity in the normal state of more than 160 and 1300 m Omega cm maximum resistivity for KxFe2Se2 and CsxFe2Se2 single crystals, respectively. Much larger upper critical field H-c2 is inferred from low-temperature isomagnetic-field magnetoresistance in these crystals than in FeSe. The anisotropy H-c2(ab)(0)/H-c2(c)(0) is estimated to be around 3 for both of the two materials. Anisotropic peculiar magnetic behavior in normal state has been found for CsxFe2Se2

引用

页数：4

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