Enhanced flux pinning properties of Ga2O3: YBCO nanocomposite superconductor

IF 2.8 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Physica B-condensed Matter Pub Date : 2024-10-28 DOI:10.1016/j.physb.2024.416669

Sandeep Kumar, Gaurav Kumar, Neeraj Khare

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Abstract

The effect of adding various concentrations (0.1–0.5 wt%) of Ga₂O₃ nanorods (NRs) on structural, electrical, magnetic, and flux pinning properties of the YBa₂Cu O_7-δ (YBCO) superconductor is studied. The critical current density (J_c) and flux pinning force (F_p) values are found to enhance significantly, and the nanocomposite sample with x = 0.2 wt% shows the maximum enhancement among the samples under study. At 4 K, the maximum value of J_c (J_cmax) and F_p (F_pmax) for the 0.2 wt% sample are ∼ 2.87 and 3 times higher and at 65 K, these increments are ∼ 3.54 and 3.4 times, as compared to pure YBCO respectively. Moreover, the J_c value for the composite samples has a lower decay with increasing temperature than the pure YBCO samples. The enhanced superconducting properties of the xGa₂O₃: YBCO can be attributed to the lattice defects induced by Ga₂O₃ NRs, which act as effective pinning centers.

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Ga2O3: YBCO 纳米复合超导体的增强磁通钉凝特性

研究了添加不同浓度（0.1-0.5 wt%）的 Ga2O3 纳米棒（NRs）对 YBa2Cu O7-δ （YBCO）超导体的结构、电学、磁学和磁通钉凝特性的影响。研究发现，临界电流密度 (Jc) 和磁通钉扎力 (Fp) 值显著提高，在所研究的样品中，x = 0.2 wt% 的纳米复合材料样品的提高幅度最大。在 4 K 时，0.2 wt% 样品的 Jc (Jcmax) 和 Fp (Fpmax) 的最大值分别是纯 YBCO 的 2.87 倍和 3 倍；在 65 K 时，这两个值分别是纯 YBCO 的 3.54 倍和 3.4 倍。此外，与纯 YBCO 样品相比，复合样品的 Jc 值随温度升高的衰减更小。xGa2O3: YBCO 超导特性的增强可归因于 Ga2O3 NRs 诱导的晶格缺陷，它是有效的引脚中心。

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来源期刊

Physica B-condensed Matter 物理-物理：凝聚态物理

CiteScore

4.90

自引率

7.10%

发文量

703

审稿时长

44 days

期刊介绍： Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces