Co-doping effects on magnetism and superconductivity in the 112-type EuFeAs2 system

被引：0

作者：

Jia Yu ^{[1
,2
]}

Tong Liu ^{[1
,3
]}

BinBin Ruan ^{[1
,4
]}

Kang Zhao ^{[1
,3
]}

QingSong Yang ^{[1
,3
]}

MengHu Zhou ^{[1
,4
]}

ZhiAn Ren ^{[1
,3
,4
]}

机构：

[1] Institute of Physics and Beijing National Laboratory for Condensed Matter Physics,Chinese Academy of Sciences

[2] School of Physics,Sun Yat-sen University

[3] School of Physical Sciences,University of Chinese Academy of Sciences

[4] Songshan Lake Materials Laboratory

来源：

Science China(Physics,Mechanics & Astronomy) | 2021年 / 06期

基金：

中国国家自然科学基金;

关键词：

EuFeAs2; iron-based superconductors; superconductivity; magnetism;

D O I：

暂无

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The discovery of EuFeAs2,currently the only charge-neutral parent phase of the 112-type iron-pnictide system,provides a new platform for the study of elemental doping effects on magnetism and superconductivity(SC).In this study,a series of polycrystalline EuFe1-yCoyAs2and Eu0.9Pr0.1Fe1-yCoyAs2samples are synthesized through solid-state reaction,and the evolutions of SC and magnetism with Co doping in EuFeAs2and Eu0.9Pr0.1FeAs2are investigated by electrical transport and magnetic susceptibility measurements.For EuFe1-yCoyAs2,the Eu-related antiferromagnetic(AFM) transition around 40 K is barely affected by Co doping,while the Fe-related spin density wave(SDW) transition temperature drops rapidly.Meanwhile,SC is induced by a trace amount of Co doping,with a highest transition temperature Tc～28 K found in EuFe0.9Co0.1As2.For the Eu0.9Pr0.1Fe1-yCoyAs2series,the magnetism and superconductivity show similar evolutions upon Co doping,and the highest Tcis enhanced to 30.6 K with an optimum doping level y～0.07.Our results shed light on the competition between SC and SDW with Co doping in the 112-type EuFeAs2system.

引用

页码：102 / 109

页数：8

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