Enhancement of Superconductivity in Quenched α-FeSe Flakes
Enhancement of Superconductivity in Quenched α-FeSe Flakes
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DOI：
10.1007/s10948-013-2194-4
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发表时间：
2013-04
影响因子：
1.8
通讯作者：
P. Zhao;W. Yan;Y. L. Han;S. Shen;G. Aldica;V. Sandu;P. Badica;J. Nie
中科院分区：
文献类型：
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作者：
P. Zhao;W. Yan;Y. L. Han;S. Shen;G. Aldica;V. Sandu;P. Badica;J. Nie
用一种简单的方法制备了四方α-FeSe薄片。在淬火样品中观察到超导电性的增强。利用X射线衍射仪、超导量子干涉仪和物理性能测试系统对其进行了表征。有趣的是，淬火样品的超导转变温度比未淬火样品高约2K，但再退火后，超导电性的增强消失。FeSe薄片的超导电性增强可能是由于FeSe薄片中C/A比的降低所致。
Tetragonalα-FeSe flakes were fabricated by a simple method. Enhancement of superconductivity was observed in the quenched samples. The properties were characterized by X-ray diffraction, a superconductivity quantum interference device, and physical property measurement system. It is interesting that the superconducting transition temperature of the quenched samples is about 2 K higher than that of unquenched samples, but after reannealed, the enhancement of superconductivity disappeared. The reduction of thec/aratio might be responsible for the enhancement of superconductivity in the quenched FeSe flakes.