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arXiv 0912.0997cond-mat.supr-concond-mat.str-el
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FeSe1/2Te1/2超导体的合成与物理性质

Synthesis and Physical Properties of FeSe1/2Te1/2 Superconductor

V. P. S. Awana, Anand Pal, Arpita Vajpayee, Monika Mudgel, H. Kishan, Mushahid Husain, R. Zeng, S. Yu, Y. F. Guo, Y. G. Shi, K. Yamaura, E. Takayama-Muromachi

摘要:

最近报道的FeSe基超导体的最重要的性质之一是它们在施加磁场下的超导性的鲁棒性。FeSe基化合物超导电性的合成和控制是一个相当困难的课题。本文报道了FeSe_(1/2)Te_(1/2)在13 K下的最佳超导电性的合成和物理性质表征。该化合物为四方晶系,晶格参数a = 3.8008(10),c = 6.0187(15)A。磁化强度测量表明,超导体的低临界场(Hc 1)约为180 Oe,应用Ginzburg Landau(GL)理论,在90%的电阻转变时,Hc 2(0)值约为1840 kOe。热容量测量揭示了体超导性由一个驼峰在Tc附近13 K,和预期的减少下观察到的施加磁场。

英文摘要:

One of the most important properties of very recently reported FeSe based superconductors is the robustness of their superconductivity under applied magnetic field. The synthesis and control of superconductivity in FeSe based compounds is rather a difficult task. Synthesis and physical property characterization for optimized superconductivity of FeSe1/2Te1/2 at 13 K is reported here. The compound crystallized in a tetragonal structure with lattice parameters a = 3.8008(10) and c = 6.0187 (15) A. Magnetization measurements indicated bulk superconductivity with lower critical field (Hc1) of around 180 Oe. By applying Ginzburg Landau (GL) theory, the Hc2(0) value is estimated to be = 1840 kOe for the 90% of resistive transition. A heat capacity measurement revealed bulk superconductivity by a hump at Tc near 13 K, and an expected decrease was observed under an applied magnetic field.

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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