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<p>The magneto-transport properties of Ga<sub>2</sub>O<sub>3</sub> nanorod-added YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> (YBCO) nanocomposites&#xa0;with Ga<sub>2</sub>O<sub>3</sub> concentrations varying from 0 to 0.5 wt%&#xa0;are systematically investigated. The incorporation of Ga<sub>2</sub>O<sub>3</sub> nanorods in YBCO matrix reduces the superconducting transition width (ΔT), indicating improved grain connectivity in the nanocomposite samples compared to pristine YBCO. Analysis based on thermally activated flux flow (TAFF) reveals an enhancement of the activation energy (U<sub>0</sub>) by nearly 35%, suggesting stronger vortex pinning after nanorod addition. Furthermore, Ginzburg–Landau analysis shows that the resistive upper critical field H<sub>c2</sub>(0) increases from ~ 178&#xa0;T for pure YBCO to ~ 231&#xa0;T for the nanocomposite samples. The field dependence of U<sub>0</sub> indicates that the dominant pinning mechanism remains unchanged, while the improved superconducting performance originates from defect structures introduced by the Ga<sub>2</sub>O<sub>3</sub> nanorods, which act as effective flux-pinning centers. Overall, the results demonstrate that the incorporation of Ga<sub>2</sub>O<sub>3</sub> nanorods effectively enhances the high-field magneto-transport performance of YBCO nanocomposites.</p>

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Improving Magneto-Transport Properties of YBCO via Inclusion of Gallium Oxide Nanorods

  • 期刊论文

  • 发表日期：

    2026年6月28日

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  • Sandeep Kumar,
  • Rajni Kandari,
  • Neeraj Khare

摘要

The magneto-transport properties of Ga2O3 nanorod-added YBa2Cu3O7-δ (YBCO) nanocomposites with Ga2O3 concentrations varying from 0 to 0.5 wt% are systematically investigated. The incorporation of Ga2O3 nanorods in YBCO matrix reduces the superconducting transition width (ΔT), indicating improved grain connectivity in the nanocomposite samples compared to pristine YBCO. Analysis based on thermally activated flux flow (TAFF) reveals an enhancement of the activation energy (U0) by nearly 35%, suggesting stronger vortex pinning after nanorod addition. Furthermore, Ginzburg–Landau analysis shows that the resistive upper critical field Hc2(0) increases from ~ 178 T for pure YBCO to ~ 231 T for the nanocomposite samples. The field dependence of U0 indicates that the dominant pinning mechanism remains unchanged, while the improved superconducting performance originates from defect structures introduced by the Ga2O3 nanorods, which act as effective flux-pinning centers. Overall, the results demonstrate that the incorporation of Ga2O3 nanorods effectively enhances the high-field magneto-transport performance of YBCO nanocomposites.