To cite this article: Ahmed, Y. A. et al. (2018). Critical current density and vortex pinning strength in the κ(BEDT-TTF)2Cu[N(CN)2]Br organic superconductor. J. Phys. Sci., 29(3), 13–22, https://doi.org/10.21315/jps2018.29.3.2
This paper systematically studied the critical current density and pinning strength as functions of the cooling rate through the order-disorder transformation near 80 K for both the hydrogenated (κ-H8-Br) and deuterated (κ-D8-Br) κ-(BEDT-TTF)2Cu[N(CN)2] Br organic superconductors. By analysing the magnetic hysteresis loops using Bean’s model, we estimated the critical current density (JC). Our results have shown that cooling the sample at different rates through the order-disorder transformation near 80 K had a dramatic effect on critical current density, the superconducting transition temperature (TC) and the pinning strength (FP). The effect was pronounced for the deuterated κ-(BEDTTTF) 2Cu[N(CN)2 ]Br compound where C2H4 hydrogen molecules were replaced by the deuterium.