Growth and characterization of A1-xKxFe2As2 (A = Ba, Sr) single crystals with x=0-0.04

被引：112

作者：

Luo, Huiqian ^{[1
]}

Wang, Zhaosheng

Yang, Huan

Cheng, Peng

Zhu, Xiyu

Wen, Hai-Hu

机构：

[1] Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2008年 / 21卷 / 12期

关键词：

D O I：

10.1088/0953-2048/21/12/125014

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Single crystals of A(1-x)K(x)Fe(2)As(2) (A = Ba, Sr) with high quality have been grown successfully by an FeAs self-flux method. The samples have sizes up to 4 mm with flat and shiny surfaces. The x-ray diffraction patterns suggest that they have high crystalline quality and c-axis orientation. The non-superconducting crystals show a spin-density-wave (SDW) instability at about 173 and 135 K for the Sr-based and Ba-based compound, respectively. After doping K as the hole dopant into the BaFe2As2 system, the SDW transition is smeared, and superconducting samples of the compound Ba1-xKxFe2As2 (0 < x <= 0.4) are obtained. The superconductors, characterized by AC susceptibility and resistivity measurements, exhibit very sharp superconducting transitions at about 36, 32, 27 and 23 K for x = 0.40, 0.28, 0.25 and 0.23, respectively.

引用

页数：5

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