Current profiles and AC losses of a superconducting strip with elliptic cross-section in perpendicular magnetic field

The case of a hard type II superconductor in the form of strip with elliptic cross-section when placed in transverse magnetic field is studied. We approach the problem in two steps, both based on the critical-state model. First we calculate numerically the penetrated current profiles that ensure com...

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Bibliographic Details
Published in:arXiv.org 2002-06
Main Authors: Gomory, F, Tebano, R, Sanchez, A, Pardo, E, Navau, C, Husek, I, Strycek, F, Kovac, P
Format: Article
Language:English
Subjects:
Alternating current
Cross-sections
Magnetic fields
Magnetic permeability
Magnetic shielding
Magnetism
Mathematical models
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Summary:The case of a hard type II superconductor in the form of strip with elliptic cross-section when placed in transverse magnetic field is studied. We approach the problem in two steps, both based on the critical-state model. First we calculate numerically the penetrated current profiles that ensure complete shielding in the interior, without assuming an a priori form for the profiles. In the second step we introduce an analytical approximation that asumes that the current profiles are ellipses. Expressions linking the sample magnetization to the applied field are derived covering the whole range of applied fields. The theoretical predictions are tested by the comparison with experimental data for the imaginary part of AC susceptibility.
ISSN:2331-8422
DOI:10.48550/arxiv.0206229