arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1201.1709cond-mat.str-elcond-mat.mtrl-sci
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$A_x$ Fe $_{2-y}$ S $_2$($A$ =K、Rb和Cs)单晶的物理性质

Physical properties of $A_x$Fe$_{2-y}$S$_2$ ($A$=K, Rb and Cs) single crystals

J. J. Ying, Z. J. Xiang, Z. Y. Li, Y. J. Yan, M. Zhang, A. F. Wang, X. G. Luo, X. H. Chen

摘要:

我们成功地合成了两个新的化合物Rb $_x$ Fe $_{2-y}$ S $_2$和Cs $_x$ Fe $_{2-y}$ S $_2$,它们与K $_x$ Fe $_{2-y}$ Se $_2$超导体是同构的。系统地研究了$A_x$ Fe $_{2-y}$ S $_2$($A$ =K,Rb,Cs)单晶的电阻率、磁性和热电势。高温电阻率和磁性测量结果表明,500 K以上的异常取决于$A$,这是类似于$A_x$ Fe $_{2-y}$ Se $_2$。KPDMATHABMM Fe $_{2-y}$ S $_2$和RbPDMATHABMM Fe $_{2-y}$ S $_2$的ZFC和FC曲线不一致,而Cs $_x$ Fe $_{2-y}$ S $_2$的ZFC和FC曲线不一致。结果表明,$A_x$ Fe $_{2-y}$ S $_2$和$A_x$ Fe $_{2-y}$ Se $_2$在高温下具有相似的磁性.

英文摘要:

We successfully synthesized two new compounds Rb$_x$Fe$_{2-y}$S$_2$ and Cs$_x$Fe$_{2-y}$S$_2$ which were isostructural with K$_x$Fe$_{2-y}$Se$_2$ superconductor. We systematically investigated the resistivity, magnetism and thermoelectric power of $A_x$Fe$_{2-y}$S$_2$ ($A$=K, Rb and Cs) single crystals. High temperature resistivity and magnetic measurements show anomalies above 500 K depending on $A$ which are similar to $A_x$Fe$_{2-y}$Se$_2$. Discrepancy between ZFC and FC curves was observed in K$_x$Fe$_{2-y}$S$_2$ and Rb$_x$Fe$_{2-y}$S$_2$, while it disappears in Cs$_x$Fe$_{2-y}$S$_2$. Our results indicate the similar magnetism between $A_x$Fe$_{2-y}$S$_2$ and $A_x$Fe$_{2-y}$Se$_2$ at high temperature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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