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首页> 外文期刊>Physica, C. Superconductivity and its applications >Interpretation of the critical current in Bi2Sr2Ca3Cu3Ox tape conductors as parallel weak-link and strong-link paths
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Interpretation of the critical current in Bi2Sr2Ca3Cu3Ox tape conductors as parallel weak-link and strong-link paths

机译：将Bi2Sr2Ca3Cu3Ox带状导体中的临界电流解释为平行的弱链接和强链接路径

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摘要

To better understand the dominant mechanisms that limit the critical Current density in high temperature superconductors. the dependence of the critical current density on magnetic field and temperature of Bi2Sr2Ca2Cu3Olambda tapes is measured in magnetic fields up to 8 T and temperatures between 4.2 and 100 K, The results were modeled by describing the current in the tape as two parallel current paths. The critical current density of one path is limited by weak links and that of the other path by intragranular flux pinning. The temperature dependence of the parameters used in the model indicates that the weak link contribution vanishes at a temperature of 86 K. This is an indication that the weak link behavior is dominated by a remnant Bi2Sr2CaCu2Olambda phase. At higher temperatures the critical current density of the tape is limited by intragranular pinning. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 15]
机译：为了更好地理解限制高温超导体中临界电流密度的主要机制。在高达8 T的磁场和4.2至100 K的温度范围内，测量了临界电流密度对Bi2Sr2Ca2Cu3Olambda胶带的磁场和温度的依赖性。通过将胶带中的电流描述为两条平行电流路径，对结果进行了建模。一条路径的临界电流密度受到弱连接的限制，而另一条路径的临界电流密度则受到颗粒内磁通钉扎的限制。模型中使用的参数的温度相关性表明，弱链接贡献在86 K的温度下消失。这表明弱链接行为主要由剩余的Bi2Sr2CaCu2Olambda相主导。在较高的温度下，带的临界电流密度受到晶内钉扎的限制。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：15]

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