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Vortex-Glass Phase Transition And Enhanced Flux Pinning In C 4+-Irradiated Bafe1.9ni0.1as2 Superconducting Single Crystals, M Shahbazi, X Wang, S Ghorbani, M Ionescu, Olga Shcherbakova, Frederick Wells, Alexey Pan, S Dou, K Choi
Vortex-Glass Phase Transition And Enhanced Flux Pinning In C 4+-Irradiated Bafe1.9ni0.1as2 Superconducting Single Crystals, M Shahbazi, X Wang, S Ghorbani, M Ionescu, Olga Shcherbakova, Frederick Wells, Alexey Pan, S Dou, K Choi
Frederick S Wells
We report the effects of C4+-irradiation on the superconducting properties of BaFe1.9Ni0.1As2 single crystal. The BaFe1.9Ni0.1As2 single crystal before and after C4+-irradiation was characterized by magnetic, magneto-transport and magneto-optical techniques over a wide range of magnetic fields (0-13 T) and temperatures (2-200 K). We demonstrate that the C 4+-irradiation significantly enhances the in-field critical current density (by a factor of up to 1.5 at 5 K) and induces enhanced flux jumping at 2 K, with only a small degradation (by 0.5 K) of the critical temperature, T c. The vortex phase diagram describing the evolution of the vortex-glass transition temperature …