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首页> 外文会议>2014 International Conference on Electrical Sciences and Technologies in Maghreb >Critical current density determination of superconducting material
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Critical current density determination of superconducting material

机译：超导材料的临界电流密度测定

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摘要

Knowledge of the law critical current density versus magnetic field, J(B), of a superconducting material is very important to users. In this article are presented two methods of characterization to obtain experimentally the law J (B). These two methods are commonly used for applications in electrical engineering. The electrical method is based on measuring the voltage and current of a superconducting sample. It has the advantage of simplicity in implementation, but the main drawback as the presence of the self magnetic field. This prevents the determination of the parameters of JC(B) for weak magnetic fields. The magnetic method using the cycle of magnetization has the advantage of making measurements without contact with the sample but has two drawbacks: it is based on a theoretical model in which JC is constant and the assumption of infinite length sample.
机译：对用户来说，了解超导材料的临界电流密度与磁场J（B）的关系定律非常重要。本文介绍了两种表征方法，可以通过实验获得定律J（B）。这两种方法通常用于电气工程中。电气方法基于测量超导样品的电压和电流。它具有实现简单的优点，但是主要缺点是存在自磁场。这阻止了确定弱磁场的JC（B）参数。使用磁化周期的磁性方法的优点是可以在不与样品接触的情况下进行测量，但是有两个缺点：它基于理论模型（其中JC恒定）和无限长的样品假设。

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