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Thermally activated flux flow in Fe1.06Te0.6Se0.4 single crystal

Journal Article


Abstract


  • Resistivity of Fe1.06Te0.6Se0.4 single crystal is investigated around superconducting transition region in different magnetic fields. The thermally activated energy (TAE) is analysed using the Arrhenius relation and modified thermally activated flux flow (TAFF) model. The results indicate that the Arrhenius curve slopes are directly related to but not equal to TAE. Therefore, use of the modified TAFF model is suggested, ρ(T,B) = ρ0f exp(-U/T), where the temperature dependence of the pre-factor ρ0f = 2ρcU/T and the nonlinear relation of the TAE should be considered. The modified TAFF method results are in good agreement with the very high critical current density values from the experimental data. It was found that the vortex glass has a narrow region, and it depends weakly on magnetic field. The vortex phase diagram was determined based on the evolution of the vortex-glass transition temperature with magnetic field and the upper critical field.

Authors


  •   Shahbazi, Mahboobeh (external author)
  •   Wang, Xiaolin
  •   Ghorbani, Shaban (external author)
  •   Dou, Shi Xue
  •   Lin, C T. (external author)

Publication Date


  • 2015

Citation


  • Shahbazi, M., Wang, X. L., Ghorbani, S. R., Dou, S. X. & Lin, C. T. (2015). Thermally activated flux flow in Fe1.06Te0.6Se0.4 single crystal. Physica C: Superconductivity and its Applications, 519 60-64.

Scopus Eid


  • 2-s2.0-84942246670

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1589

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 60

End Page


  • 64

Volume


  • 519

Place Of Publication


  • Netherlands

Abstract


  • Resistivity of Fe1.06Te0.6Se0.4 single crystal is investigated around superconducting transition region in different magnetic fields. The thermally activated energy (TAE) is analysed using the Arrhenius relation and modified thermally activated flux flow (TAFF) model. The results indicate that the Arrhenius curve slopes are directly related to but not equal to TAE. Therefore, use of the modified TAFF model is suggested, ρ(T,B) = ρ0f exp(-U/T), where the temperature dependence of the pre-factor ρ0f = 2ρcU/T and the nonlinear relation of the TAE should be considered. The modified TAFF method results are in good agreement with the very high critical current density values from the experimental data. It was found that the vortex glass has a narrow region, and it depends weakly on magnetic field. The vortex phase diagram was determined based on the evolution of the vortex-glass transition temperature with magnetic field and the upper critical field.

Authors


  •   Shahbazi, Mahboobeh (external author)
  •   Wang, Xiaolin
  •   Ghorbani, Shaban (external author)
  •   Dou, Shi Xue
  •   Lin, C T. (external author)

Publication Date


  • 2015

Citation


  • Shahbazi, M., Wang, X. L., Ghorbani, S. R., Dou, S. X. & Lin, C. T. (2015). Thermally activated flux flow in Fe1.06Te0.6Se0.4 single crystal. Physica C: Superconductivity and its Applications, 519 60-64.

Scopus Eid


  • 2-s2.0-84942246670

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1589

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 60

End Page


  • 64

Volume


  • 519

Place Of Publication


  • Netherlands