Magnetization of a Current-Carrying Superconducting Disk with B-Dependent Critical Current Density

In the frame work of the critical state model (CSM), the magnetic response of a thin type-II superconducting disk that carries a radial transport current and is subjected to an applied magnetic field have been studied. To this end, we have studied the process of the magnetic flux-penetration. For a...

Full description

Saved in:
Bibliographic Details
Published in:Journal of low temperature physics 2010-11, Vol.161 (3-4), p.395-409
Main Authors: Sohrabi, Mahdi, Babaei-Brojeny, Ali A.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Critical current density
Current density
Disks
Magnetic fields
Magnetic flux
Magnetic Materials
Magnetism
Magnetization
Mathematical models
Physics
Physics and Astronomy
Superconductivity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In the frame work of the critical state model (CSM), the magnetic response of a thin type-II superconducting disk that carries a radial transport current and is subjected to an applied magnetic field have been studied. To this end, we have studied the process of the magnetic flux-penetration. For a disk initially containing no magnetic flux but carrying a radial current, when a perpendicular magnetic field is applied, magnetic flux-penetration occurs in three stages: (1) the magnetic flux gradually penetrates from the edges of the disk until an instability occurs, (2) there is a rapid inflow of magnetic flux into the disk’s central region, which becomes resistive, and (3) magnetic flux continues to enter the disk, while persistent azimuthal currents flow in an outer annular region where the net current density is equal to  J c . Also the behavior of a current-carrying disk subjected to an AC magnetic field is calculated. The magnetic flux, the current profiles and the magnetization hysteresis loops are calculated for several commonly used J c ( B ) dependences. Finally, the results of the applications of the local field-dependent of the critical current density J c ( B ) are compared with those obtained from the Bean model.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-010-0195-2