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首页> 外文期刊>Solid State Communications >Investigation of the variation in weak-link profile of YBa_2Cu_(3-x)Ag_xO_(7-δ) superconductors by Ag doping concentration
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Investigation of the variation in weak-link profile of YBa_2Cu_(3-x)Ag_xO_(7-δ) superconductors by Ag doping concentration

机译：Ag掺杂浓度研究YBa_2Cu_（3-x）Ag_xO_（7-δ）超导体的弱链分布变化

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摘要

The effect of Ag doping concentration on the microstructure, transport properties and weak-link profile of YBa_2Cu_(3-x)-Ag_xO_(7-δ) bulk superconducting compound was investigated through resistance-temperature (R-T), ac magnetic susceptibility (X-T), scanning electron microscope (SEM), X-ray diffraction (XRD) and the critical current density (J_c) versus applied magnetic field (J_c - B) measurements. We used the additive method with cationic ratio of x = 0.1 - 0.4 for the YBCO-Ag system. The change in the silver doping concentration slightly affected the transition temperatures (T_(c,zero)), whereas, the critical current densities (J_c) of the samples and their magnetic field (B) dependencies were noticeably affected. The improvement on the microstructural properties of YBCO bulk superconductors was observed in SEM analysis, the J_c values increased and their magnetic field dependencies decreased with the increasing of Ag concentration up to x = 0.2. As well as the current transport properties. Ag doping up to a certain amount produces texturing that gives rise to a modification in the weak-link profile resulting in an enhanced strength of flux pinning which causes an increase in the current carrying capacity.
机译：通过电阻温度（RT），交流磁化率（XT）研究了Ag掺杂浓度对YBa_2Cu_（3-x）-Ag_xO_（7-δ）块状超导化合物的微观结构，输运性能和弱键分布的影响。 ，扫描电子显微镜（SEM），X射线衍射（XRD）和临界电流密度（J_c）对施加磁场（J_c-B）的测量。对于YBCO-Ag系统，我们使用阳离子比率x = 0.1-0.4的加法。银掺杂浓度的变化对转变温度（T_（c，零））有轻微影响，而样品的临界电流密度（J_c）及其磁场（B）依存性受到明显影响。在SEM分析中观察到YBCO块状超导体的微观结构性能的改善，随着Ag浓度增加到x = 0.2，J_c值增加而它们的磁场依赖性减小。以及当前的传输属性。掺入一定量的银会产生织构，从而使弱链接轮廓发生变化，从而导致磁通钉扎强度增强，从而导致载流能力增加。

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