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<p>In this study, we detail the KNbO<sub>3</sub>:YBCO film deposition process using the pulsed laser deposition (PLD) technique and explore the influence of potassium niobate (KNbO<sub>3</sub>) nanoparticles (NPs) on pinning characteristics of nanocomposite YBCO films. The XRD investigation confirms the orthorhombic phase of YBCO, and it remains consistent even when NPs are included in the nanocomposites. A Magnetic Property Measurement System (MPMS) is used to measure the magnetic characteristics, applying a field within a range of ± 7&#xa0;T. The KNbO<sub>3</sub>:YBCO nanocomposite thin films exhibit higher critical current (<i>J</i><sub><i>c</i></sub>) in comparison to YBCO films. Notably, the most substantial improvement, ~ 3.5-fold, in <i>J</i><sub><i>c</i></sub> and flux pinning properties is observed in 0.5 wt% KNbO<sub>3</sub>:YBCO nanocomposite thin films. Furthermore, the investigation reveals that nanocomposite films display a slower rate of <i>J</i><sub><i>c</i></sub> decay with the increase of fields as compared to YBCO thin films, indicating improved pinning properties. The results indicate that introducing small KNbO<sub>3</sub> nanoparticles in YBCO matrix is an effective way to enhance the in-field performance of YBCO.</p>

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Enhanced Critical Current Density and Flux Pinning in KNbO3: YBCO Nanocomposite Thin Films

  • 期刊论文

  • 发表日期：

    2025年1月9日

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  • Gaurav Kumar,
  • Neeraj Khare

摘要

In this study, we detail the KNbO3:YBCO film deposition process using the pulsed laser deposition (PLD) technique and explore the influence of potassium niobate (KNbO3) nanoparticles (NPs) on pinning characteristics of nanocomposite YBCO films. The XRD investigation confirms the orthorhombic phase of YBCO, and it remains consistent even when NPs are included in the nanocomposites. A Magnetic Property Measurement System (MPMS) is used to measure the magnetic characteristics, applying a field within a range of ± 7 T. The KNbO3:YBCO nanocomposite thin films exhibit higher critical current (Jc) in comparison to YBCO films. Notably, the most substantial improvement, ~ 3.5-fold, in Jc and flux pinning properties is observed in 0.5 wt% KNbO3:YBCO nanocomposite thin films. Furthermore, the investigation reveals that nanocomposite films display a slower rate of Jc decay with the increase of fields as compared to YBCO thin films, indicating improved pinning properties. The results indicate that introducing small KNbO3 nanoparticles in YBCO matrix is an effective way to enhance the in-field performance of YBCO.