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A theoretical basis of the approach for the magnetic field penetration measurement

机译:磁场渗透测量方法的理论基础

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An approach for the assessment of London penetration depth of superconducting films is proposed. This approach is based on the analysis of linear response of the sample to a local low-frequency alternating magnetic field generated by the measuring coil disposed near the film surface. A visual "electrical engineering" model of induced currents distribution in the superconductor taking into account the kinetic inductance was developed for a description of this response. The possibility of determining of the penetration depth from changing the inductance of the system "coil-sample" is shown in the framework of this model. The sensitivity of the proposed method for the films with different thicknesses is considered.
机译:提出了一种评估超导膜的伦敦渗透深度的方法。该方法基于分析样品的线性响应到由设置在膜表面附近的测量线圈产生的局部低频交流场。考虑到超导体中的诱导电流分布的视觉“电气工程”模型用于对动力学电感进行了描述。在该模型的框架中示出了从改变系统“线圈样本”的电感的渗透深度的可能性。考虑了所提出的具有不同厚度的膜方法的灵敏度。

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