Numerical Model for Calculating the Field Dependence of the Irreversible Magnetisation of Hard Ssuperconductors in High Pulsed Magnetic Fields

TL;DR

This paper presents a numerical model to describe the magnetic field dependence of irreversible magnetization in hard superconductors, incorporating local critical current density variations influenced by magnetic and electric fields, validated against pulsed field measurements.

Contribution

It introduces a numerical approach that accounts for field-dependent critical current density and electric field effects in modeling superconductor magnetization.

Findings

Model accurately fits experimental data

Highlights importance of electric field in magnetization behavior

Provides insights into superconductor magnetic properties

Abstract

In type II hard superconductors the irreversible magnetization shows an impressive variety of different magnetic field dependencies. In this paper we will try to describe the M(H) relation at fixed temperature To by a numerical model in which we incorporate two features: the magnetic and electric field dependency of the local critical current density j(To,H,E). The electric field is determined by the magnetic field sweep rate; in effect E ~ dB/dt. We confront the model with experimental pulsed field magnetization measurements (PFMM) on a fast melt processed YBa2Cu3O7 sample.