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首页> 外文期刊>Physica, C. Superconductivity and its applications >Initial composition dependence of the critical current density in filamentary NSG123 superconductors
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Initial composition dependence of the critical current density in filamentary NSG123 superconductors

机译：丝状NSG123超导体中临界电流密度的初始组成依赖性

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摘要

The effect of the starting composition on the superconducting properties for ternary system (Nd, Sm, Gd)-Ba-Cu-O filaments was systematically investigated. The filaments with the composition of (Nd-0.33,Sm-0.33,Gd-0.33)(1.18)Ba2.12Cu3.09Oy (sample A), (Nd-0.50,Sm-0.25,Gd-0.25)(1.18)Ba2.12Cu3.09Oy (sample B), (Nd-0.25,Sm-0.50,Gd-0.25)(1.18)Ba2.12Cu3.09Oy (sample C) and (Nd-0.25,Sm-0.25,GdO.50)(1.18)Ba2.12Cu3.09Oy (sample D) were prepared by a solution spinning method. All samples partially melted at temperature range of 1030-1080 degrees C in flowing 0.1% O-2 + Ar exhibited J(c) value higher than 10(4) A/cm(2) at 77.3 K and self-field. Among these samples, the best transport J(c) value of 7.2 x 10(4) A/cm(2) was attained in sample B with Nd-rich composition. The field dependence of transport J(c) value was also examined at various temperatures between 77.3 K and 90 K in applied magnetic fields up to 17 T. In the case of samples A. the J(c) value gradually decreased with increasing the applied magnetic field, and the J(c) value of 2.4 x 10(3) A/cm(2) at 77.3 K was maintained up to high magnetic fields of 17 T. On the contrary, the Jc value of sample B decreased with increasing the applied magnetic field and the superconductivity disappeared at about 15 T. It was found that the three element ratio in NSG123 contributed to flux pinning in a different manner and affected in J(c) behavior in magnetic field.
机译：系统地研究了起始组成对三元体系（Nd，Sm，Gd）-Ba-Cu-O长丝超导性能的影响。组成为（Nd-0.33，Sm-0.33，Gd-0.33）（1.18）Ba2.12Cu3.09Oy（样品A），（Nd-0.50，Sm-0.25，Gd-0.25）（1.18）Ba2的长丝。 12Cu3.09Oy（样品B），（Nd-0.25，Sm-0.50，Gd-0.25）（1.18）Ba2.12Cu3.09Oy（样品C）和（Nd-0.25，Sm-0.25，GdO.50）（1.18）通过溶液纺丝法制备Ba2.12Cu3.09Oy（样品D）。所有样品在1030-1080摄氏度的温度范围内在流动的0.1％O-2 + Ar中部分熔化，在77.3 K和自电场下，其J（c）值均高于10（4）A / cm（2）。在这些样品中，具有富含Nd的样品B的最佳运输J（c）值为7.2 x 10（4）A / cm（2）。还在高达17 T的外加磁场中，在77.3 K和90 K之间的各种温度下，研究了运输J（c）值的场相关性。对于样品A，随着外加量的增加，J（c）值逐渐降低磁场，在77.3 K时，J（c）值为2.4 x 10（3）A / cm（2）保持到17 T的高磁场。相反，样品B的Jc值随着增加而减小施加的磁场和超导性在15 T时消失。发现NSG123中的三元素比率以不同的方式有助于磁通钉扎，并影响磁场中的J（c）行为。

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