Superconductivity and phase diagram in iron-based arsenic-oxides ReFeAsO1-δ (Re = rare-earth metal) without fluorine doping
Superconductivity and phase diagram in iron-based arsenic-oxides ReFeAsO1-δ (Re = rare-earth metal) without fluorine doping
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DOI：
10.1209/0295-5075/83/17002
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发表时间：
2008-01-01
期刊：
影响因子：
1.8
通讯作者：
Zhao, Zhong-Xian
中科院分区：
文献类型：
--
作者：
Ren, Zhi-An;Che, Guang-Can;Zhao, Zhong-Xian
在这里，我们报告了一类新的超导体的高压合成制备的四元家庭ReFeAsO（1-δ）（Re = Sm，Nd，Pr，Ce，La）没有氟掺杂。这些化合物的超导起始温度（T（c））随Re原子尺寸的减小而增大，SmFeAsO（1-δ）的T（c）最高可达55 K。对于具有不同氧浓度的NdFeAsO（1-delta）化合物，发现圆顶形相图。版权所有（c）EPLA，2008。
Here we report a new class of superconductors prepared by high-pressure synthesis in the quaternary family ReFeAsO(1-delta) (Re = Sm, Nd, Pr, Ce, La) without fluorine doping. The onset superconducting critical temperature (T(c)) in these compounds increases with the reduction of the Re atom size, and the highest T(c) obtained so far is 55K in SmFeAsO(1-delta). For the NdFeAsO(1-delta) compound with different oxygen concentration a dome-shaped phase diagram was found. Copyright (c) EPLA, 2008.