Effect of annealing on superconductivity in Fe_(1+y)(Te_(1-x)S_x) system

作     者：DONG ChiHeng WANG HangDong YANG JinHu QIAN Bin CHEN Jian LI ZuJuan YUAN HuiQiu FANG MingHu 

作者机构：Department of PhysicsZhejiang UniversityHangzhou 310027China Department of PhysicsChangshu Institute of TechnologyChangshu 215500China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学:物理学、力学、天文学(英文版))

年 卷 期：2010年第53卷第7期

页      面：1216-1220页

核心收录：

学科分类：080705[工学-制冷及低温工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0807[工学-动力工程及工程热物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 10974175 and 10934005) the National Basic Research Program of China (Grant No. 2009CB929104) the PCSIRT of the Ministry of Education of China (Grant No. IRT0754) 

主　　题：Fe-Based superconductors Fe1+y(Te1-xSx)single crystal annealing effect 

摘      要：We have synthesized polycrystalline samples of Fe1.11(Te1-xSx) and single crystals of Fe1+y(Te0.88S0.12),and characterized their *** results show that the solid solution of S in the Fe1.11Te tetragonal lattice is limited,~10%.We observed superconductivity at ~8 K in both polycrystalline samples and single *** measurements reveal that the volume fraction is small for this superconducting phase in both polycrystalline samples as-synthesized and single crystals *** is found that annealing in air enhances the superconducting fraction;the maximum fraction is almost 100% in the single crystals annealed in air at 300°*** discuss the effect of annealing on superconductivity and transport properties at the normal state in the Fe1+y(Te1-xSx) system in terms of decrease of the excess Fe.