Abrupt Emergence of Pressure-Induced Superconductivity of 34 K in SrFe2As2: A Resistivity Study under Pressure
Abrupt Emergence of Pressure-Induced Superconductivity of 34 K in SrFe2As2: A Resistivity Study under Pressure
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DOI：
10.1143/jpsj.78.013709
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发表时间：
2009-01-01
影响因子：
1.7
通讯作者：
Tou, Hideki
中科院分区：
文献类型：
--
作者：
Kotegawa, Hisashi;Sugawara, Hitoshi;Tou, Hideki
本文报道了铁基超导体母材之一SrFe2As2单晶在压力下的电阻率测量。常温下T-0 = 198 K的结构相变和反铁磁相变（AFM）在压力下被抑制，有序相在P-c以上消失，类似于3.6-3.7 GPa。随着AFM态的抑制，出现了急剧转变的超导性。T-c的最大值为34.1 K，在P-c的相边界附近实现。这个T-c是其中最高的。铁基超导体的化学计量学
We report resistivity measurement under pressure in single crystals of SrFe2As2, which is one of the parent materials of Fe-based superconductors. The structural and anti ferromagnetic (AFM) transition of T-0 = 198 K at ambient pressure is suppressed under pressure, and the ordered phase disappears above P-c similar to 3.6-3.7 GPa. Superconductivity with a sharp transition appears accompanied by the suppression of the AFM state. T-c exhibits a maximum of 34.1 K, which is realized close to the phase boundary at P-c. This T-c is the highest among those. of the stoichiometric Fe-based Superconductors.