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<p>The Gibbs free energy of the magnetic superconductor FeTe<sub>0.5</sub>Se<sub>0.5</sub> has been analyzed in conjunction with the Werthamer–Helfand–Hohenberg (WHH) equation at a critical temperature (Tc) of 12&#xa0;K. This study presents the temperature dependence of the upper critical magnetic field (Hc<sub>2</sub>), coherence length (ξ<sub>GL</sub>), penetration depth (λ<sub>GL</sub>), and critical current density (Jc) of the FeTe<sub>0.5</sub>Se<sub>0.5</sub>superconductor. Using experimentally obtained values, phase diagrams were constructed, showing that Hc<sub>2</sub>, ξ<sub>GL</sub>, λ<sub>GL</sub>, and Jc exhibit non-linear temperature dependence and approach zero as T approaches Tc. The large values of the Ginzburg–Landau (GL) characteristic parameters indicate that FeTe<sub>0.5</sub>Se<sub>0.5</sub>is a strongly type-II superconductor. The results obtained in this work are in good agreement with previous experimental findings on FeTe<sub>0.5</sub>Se<sub>0.5</sub> superconductor.</p>

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Unravelling the magnetic properties of Fe0.5TeSe0.5 superconductor using Ginzburg–Landau (GL) formulation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月6日

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  • Rayees Ahmad Zargar,
  • Abida Bashir,
  • Aijaz Ahmad Wani,
  • Mudasir Ahmad Khanday,
  • Parvaiz Ahmad Khan,
  • Hilal Ahmad Reshi,
  • Vipin Kumar,
  • Arshad Ahmad Masoodi,
  • Musadiq Qadir,
  • Parvaiz Ahmad Bhat

摘要

The Gibbs free energy of the magnetic superconductor FeTe0.5Se0.5 has been analyzed in conjunction with the Werthamer–Helfand–Hohenberg (WHH) equation at a critical temperature (Tc) of 12 K. This study presents the temperature dependence of the upper critical magnetic field (Hc2), coherence length (ξGL), penetration depth (λGL), and critical current density (Jc) of the FeTe0.5Se0.5superconductor. Using experimentally obtained values, phase diagrams were constructed, showing that Hc2, ξGL, λGL, and Jc exhibit non-linear temperature dependence and approach zero as T approaches Tc. The large values of the Ginzburg–Landau (GL) characteristic parameters indicate that FeTe0.5Se0.5is a strongly type-II superconductor. The results obtained in this work are in good agreement with previous experimental findings on FeTe0.5Se0.5 superconductor.