Superconductivity in Ti-doped iron-arsenide compound Sr4Cr0.8Ti1.2O6Fe2As2

被引：0

作者：

ZHU XiYu

Beijing Na-tional Laboratory for Condensed Matter Physics

机构：

来源：

Science in China(Series G:Physics,Mechanics & Astronomy) | 2009年 / 12期

基金：

中国国家自然科学基金;

关键词：

iron-based superconductor; high-temperature superconductor; Perovskite;

D O I：

暂无

中图分类号：

TM26 [超导体、超导体材料];

学科分类号：

0805 ; 080502 ; 080801 ;

摘要：

Superconductivity was achieved in Ti-doped iron-arsenide compound Sr4Cr0.8Ti1.2O6Fe2As2 (abbreviated as Cr-FeAs-42622). The X-ray diffraction measurement shows that this material has a layered structure with the space group of P4/nmm,and with the lattice constants a = b = 3.9003  and c = 15.8376 . Clear diamagnetic signals in ac susceptibility data and zero-resistance in resistivity data were detected at about 6 K,confirming the occurrence of bulk superconductivity. Meanwhile we observed a supercon-ducting transition in the resistive data with the onset transition temperature at 29.2 K,which may be induced by the nonuniform distribution of the Cr/Ti content in the FeAs-42622 phase.

引用

页码：1876 / 1878

页数：3