Superconductor Science and Technology, ( ISI ), Volume (26), No (9), Year (2013-8) , Pages (95014-95019)

Title : ( Vortex-glass phase transition andenhanced flux pinning in C4+-irradiated BaFe1:9Ni0:1As2 superconducting single crystals )

Authors: M Shahbazi , X L Wang , Shaban Reza Ghorbani , M Ionescu , O V Shcherbakova , F S Wells , A V Pan , S X Dou , K Y Choi ,

Citation: BibTeX | EndNote

We report the effects of C4C-irradiation on the superconducting properties of BaFe1:9Ni0:1As2 single crystal. The BaFe1:9Ni0:1As2 single crystal before and after C4C-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 C4C-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, Tc. The vortex phase diagram describing the evolution of the vortex-glass transition temperature with magnetic field and the upper critical field has been resolved for the C4C-irradiated sample. For temperatures below Tc, the resistivity curves and the pinning potential were found to show good scaling, using a modified model for vortex-liquid resistivity. The vortex state is three dimensional at temperatures lower than a characteristic temperature. Good agreement between the thermally activated flux flow model, which is usually employed to account for the resistivity in the vortex-liquid region, and the modified vortex-liquid model, has been observed.

Keywords

, Vortex-glass, Flux pinning, BaFe1:9Ni0:1As2
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@article{paperid:1035708,
author = {M Shahbazi and X L Wang and Ghorbani, Shaban Reza and M Ionescu and O V Shcherbakova and F S Wells and A V Pan and S X Dou and K Y Choi},
title = {Vortex-glass phase transition andenhanced flux pinning in C4+-irradiated BaFe1:9Ni0:1As2 superconducting single crystals},
journal = {Superconductor Science and Technology},
year = {2013},
volume = {26},
number = {9},
month = {August},
issn = {0953-2048},
pages = {95014--95019},
numpages = {5},
keywords = {Vortex-glass; Flux pinning; BaFe1:9Ni0:1As2 superconductor},
}

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%0 Journal Article
%T Vortex-glass phase transition andenhanced flux pinning in C4+-irradiated BaFe1:9Ni0:1As2 superconducting single crystals
%A M Shahbazi
%A X L Wang
%A Ghorbani, Shaban Reza
%A M Ionescu
%A O V Shcherbakova
%A F S Wells
%A A V Pan
%A S X Dou
%A K Y Choi
%J Superconductor Science and Technology
%@ 0953-2048
%D 2013

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