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Magnetic invisibility of the magnetically coated type-II superconductor in partially penetrated state

Peña-Roche, J. and Genenko, Y. A. and Badía-Majós, A. (2016):
Magnetic invisibility of the magnetically coated type-II superconductor in partially penetrated state.
In: Applied Physics Letters, pp. 092601 (1, 109, (9), ISSN 0003-6951,
[Online-Edition: http://doi.org/10.1063/1.4961672],
[Article]

Abstract

The magnetic behavior of a cylindrical paramagnet/superconductor heterostructure has been studied by numerical simulations. Relying on the variational statement of the critical state model, our results show that magnetic invisibility is compatible with the partial penetration regime in the superconductor. This result accomplishes previous analytic studies that proved a possible perfect undetectability for the full penetration of magnetic flux. For a given geometry, invisibility may be realized only at a certain magnitude of the applied field. Such value decreases with increasing permeability of the magnetic sheath and eventually collapses to zero. This establishes a condition for obtaining realizable invisibility that extends previous expectations relying either on the full penetration ansatz or on perfect diamagnetism.

Item Type: Article
Erschienen: 2016
Creators: Peña-Roche, J. and Genenko, Y. A. and Badía-Majós, A.
Title: Magnetic invisibility of the magnetically coated type-II superconductor in partially penetrated state
Language: English
Abstract:

The magnetic behavior of a cylindrical paramagnet/superconductor heterostructure has been studied by numerical simulations. Relying on the variational statement of the critical state model, our results show that magnetic invisibility is compatible with the partial penetration regime in the superconductor. This result accomplishes previous analytic studies that proved a possible perfect undetectability for the full penetration of magnetic flux. For a given geometry, invisibility may be realized only at a certain magnitude of the applied field. Such value decreases with increasing permeability of the magnetic sheath and eventually collapses to zero. This establishes a condition for obtaining realizable invisibility that extends previous expectations relying either on the full penetration ansatz or on perfect diamagnetism.

Journal or Publication Title: Applied Physics Letters
Volume: 109
Number: 9
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 20 Sep 2016 10:45
Official URL: http://doi.org/10.1063/1.4961672
Additional Information:

SFB 595

Identification Number: doi:10.1063/1.4961672
Funders: Funding by Spanish MINECO and FEDER program (ENE2014-52105-R-9 project), DGA Grant No. T12, and partial support by the German DFG within the collaborative research center SFB 595 are gratefully acknowledged.
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