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Vortex-glass phase transition and enhanced flux pinning in C 4+-irradiated BaFe1.9Ni0.1As2 superconducting single crystals

Journal Article


Abstract


  • 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 with magnetic field and the upper critical field has been resolved for the C4+-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. © 2013 IOP Publishing Ltd.

UOW Authors


  •   Shahbazi, Mahboobeh (external author)
  •   Wang, Xiaolin
  •   Ghorbani, Shaban (external author)
  •   Ionescu, Mihail (external author)
  •   Shcherbakova, Olga V. (external author)
  •   Wells, Frederick (external author)
  •   Pan, Alexey
  •   Dou, Shi
  •   Choi, Ki-Young (external author)

Publication Date


  • 2013

Citation


  • Shahbazi, M., Wang, X., Ghorbani, S. R., Ionescu, M., Shcherbakova, O. V., Wells, F. S., Pan, A. V., Dou, S. X. & Choi, K. Y. (2013). Vortex-glass phase transition and enhanced flux pinning in C 4+-irradiated BaFe1.9Ni0.1As2 superconducting single crystals. Superconductor Science and Technology, 26 (9), 095014-1-095014-8.

Scopus Eid


  • 2-s2.0-84882402778

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/818

Has Global Citation Frequency


Start Page


  • 095014-1

End Page


  • 095014-8

Volume


  • 26

Issue


  • 9

Place Of Publication


  • United Kingdom

Abstract


  • 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 with magnetic field and the upper critical field has been resolved for the C4+-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. © 2013 IOP Publishing Ltd.

UOW Authors


  •   Shahbazi, Mahboobeh (external author)
  •   Wang, Xiaolin
  •   Ghorbani, Shaban (external author)
  •   Ionescu, Mihail (external author)
  •   Shcherbakova, Olga V. (external author)
  •   Wells, Frederick (external author)
  •   Pan, Alexey
  •   Dou, Shi
  •   Choi, Ki-Young (external author)

Publication Date


  • 2013

Citation


  • Shahbazi, M., Wang, X., Ghorbani, S. R., Ionescu, M., Shcherbakova, O. V., Wells, F. S., Pan, A. V., Dou, S. X. & Choi, K. Y. (2013). Vortex-glass phase transition and enhanced flux pinning in C 4+-irradiated BaFe1.9Ni0.1As2 superconducting single crystals. Superconductor Science and Technology, 26 (9), 095014-1-095014-8.

Scopus Eid


  • 2-s2.0-84882402778

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/818

Has Global Citation Frequency


Start Page


  • 095014-1

End Page


  • 095014-8

Volume


  • 26

Issue


  • 9

Place Of Publication


  • United Kingdom