Superconducting fluctuation effect in CaFe$_{0.88}$Co$_{0.12}$AsF
POSTER
Abstract
Out-of-plane angular dependent torque measurements were performed on CaFe$_{0.88}$Co$_{0.12}$AsF single crystals. Superconducting fluctuations, featured by magnetic field enhanced and exponential temperature dependent diamagnetism, are observed above the superconducting transition temperature $T_c$, which is similar to that of cuprate superconductors, but less pronounced. In addition, the ratio of $T_c$ versus superfluid density follows well the Uemura line of high-$T_c$ cuprates, which suggests the exotic nature of the superconductivity in CaFe$_{0.88}$Co$_{0.12}$AsF
*The authors acknowledge the support of NSFC, Grant No. U1530402, 11574338 and 11204338, MOST of China, Grant No. 2015CB921303, the 'Strategic Priority Research Program (B)' of the Chinese Academy of Sciences (no. XDB04040300, XDB 04040200 and XDB 04030000