Flux Pinning with Addition of Gold Nanoparticles in CuTl-1223 Superconductor

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• 作者：Liaqat Ali ; M. Mumtaz ; M. W. Rabbani
• 关键词：(Au)x/CuTl ; 1223 composites ; Activation energy ; Flux pinning ; Critical field
• 刊名：Journal of Superconductivity and Novel Magnetism
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：30
• 期：2
• 页码：325-329
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Strongly Correlated Systems, Superconductivity; Magnetism, Magnetic Materials; Condensed Matter Physics; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1557-1947
• 卷排序：30

文摘

We investigated the effects of gold (Au) nanoparticles on flux pinning in Cu_0.5Tl_0.5Ba₂Ca₂Cu₃O_10−δ (CuTl-1223) superconductor by infield temperature-dependent dc-resistivity measurements. The values of \(\phantom {\dot {i}\!}T_{\mathrm {c}}^{\text {onset}}\) (K) remained almost unaffected by applying external magnetic field on (Au)_x/CuTl-1223; (x = 0∼1.5 wt.%) composites samples. But a decreasing trend in T_c(0) and increasing trend in resistive broadening (ΔT) by increasing external applied magnetic field were reduced after addition of Au nanoparticles in CuTl-1223 superconducting matrix. The activation energy (U_o) was calculated according to thermally activated flux flow (TAFF) model by using the Arrhenius Law. The increase in T_c(0), U_o, and upper critical field (H_c2) indicates a strong flux pinning after the inclusion of Au nanoparticles and found optimum for x = 1.0 wt.%.