In-plane field-effect correction in quantitative magneto-optical analysis

Philosophical Magazine Part B Pub Date : 2002-12-01 DOI:10.1080/13642810208222944

F. Laviano, D. Botta, A. Chiodoni, R. Gerbaldo, G. Ghigo, L. Gozzelino, E. Mezzetti, S. Zannella

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引用次数: 1

Abstract

Abstract We present a detailed analysis of the calibration procedure to be performed in order to extract from magneto-optical images the local values of magnetic induction and electric current density on a plane over and inside the superconducting sample respectively. The interaction between the spontaneous magnetization of the indicator film and the full magnetic field distribution in the specimen region has been considered. In particular, the generally disregarded interaction of the indicator film with in-plane magnetic fields, that is with the component parallel to the indicator surface, is retained in the model. The current density distribution is obtained by the numerical inversion of the Biot-Savart law. In order to incorporate the in-plane field effect into the inversion scheme, we have constructed an iterative procedure which successfully takes into account the full magnetic induction field. A set of experimental data on a high-temperature superconducting YBa2Cu3O7-x film is presented to show the actual impact of the new analysis method, for what concerns both the local values of the magnetic induction and the electrical current density evaluation.

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定量磁光分析中的面内场效应校正

摘要本文详细分析了从磁光图像中提取超导样品表面和内部平面上磁感应强度和电流密度的局部值所需要执行的校准程序。考虑了指示膜的自发磁化强度与试样区全磁场分布之间的相互作用。特别是，通常被忽略的指示膜与面内磁场的相互作用，即与指示表面平行的分量，在模型中被保留。电流密度分布是通过对Biot-Savart定律的数值反演得到的。为了将面内场效应纳入反演方案，我们构造了一个考虑全磁感应场的迭代过程。以高温超导YBa2Cu3O7-x薄膜的实验数据为例，说明了新分析方法对局部磁感应值和电流密度评估的实际影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Philosophical Magazine Part B

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