---
title: Parameter-free method to extract the Jc(B,θ) field-dependence from in-field current–voltage characteristics of HTS tapes
description: "HTS Modelling Workgroup | Model files\nParameter-free method to extract the Jc(B,θ) field-dependence from in-field current–voltage characteristics of HTS tapes"
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---

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# Parameter-free method to extract the Jc(B,θ) field-dependence from in-field current–voltage characteristics of HTS tapes

 by [**administrator**](https://htsmodelling.com/model-files/author/administrator) on Mar 15, 2024, 1:00:34 PM

![animated](https://htsmodelling.com/hs-fs/hubfs/model-files/11-a-parameter-free-method/animated.gif?width=1200&height=900&name=animated.gif)

The method presented here allows computing the critical current density (Jc) of superconducting materials from its in-field experimentally measured critical current (Ic). This is particularly important for applications like HTS cables for power transmission and fault current limiters, where superconductors experience a local field that is close to the self-field of an isolated conductor. Therefore it is necessary to solve an inverse problem to correct for the contribution derived from the self–field. Here, a method that involves minimum regularization and no human interaction or preconception of the Jc dependence with respect to the magnetic field is presented. This parameter-free approach provides excellent reproduction of experimental data and runs in a few minutes.

**This model was shared by V. Zermeno, Karlsruhe Institute of Technology and K. Habelok, Silesian University of Technology**

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[Script file](https://htsmodelling.com/hubfs/model-files/11-a-parameter-free-method/Downloads/IcB2JcB.zip)

*\*Matlab, version 2015a and Comsol Multiphysics, version 5.2a with Livelink for Matlab*

References

1. [Zermeno et al. 2017 *Supercond. Sci. Tech.* 30 034001](https://dx.doi.org/10.1088/1361-6668/30/3/034001)<https://iopscience.iop.org/0953-2048/20/1/004/>

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