Superconductor/ferromagnet heterostructures exhibit potential for significant reduction of hysteretic losses

First experimental observations of the ferromagnetic shielding effect in high-Tc superconducting coated conductors were carried out. Experimental results were compared to simulations calling upon finite-element calculations based on the H-formulation of Maxwell equations to model superconducting str...

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Bibliographic Details
Published inarXiv.org
Main Authors Krueger, Philipp, Grilli, Francesco, Vojenčiak, Michal, Zermeño, Victor M R, Demencik, Eduard, Farinon, Stefania
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 06.05.2013
Subjects
Coating effects
Computer simulation
Conductors
Ferromagnetic materials
Finite element method
Heterostructures
Hysteresis
Magnetic shielding
Mathematical models
Maxwell's equations
Physics - Superconductivity
Reduction
Shields
Superconductivity
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Summary:First experimental observations of the ferromagnetic shielding effect in high-Tc superconducting coated conductors were carried out. Experimental results were compared to simulations calling upon finite-element calculations based on the H-formulation of Maxwell equations to model superconducting strips with ferromagnetic shields. Samples of copper-stabilized coated conductors were electroplated with nickel shields and afterwards characterized. Both externally applied oscillating transverse magnetic fields as well as transport currents were studied. Having observed promising gains with respect to the reduction of ac losses in both cases, we further investigated the potential of ferromagnetic shielding. The numerical model was able to reproduce and also predict experimental results very well and will serve as an indispensable tool to determine the potential of soft ferromagnetic materials to significantly reduce hysteretic losses.
ISSN:2331-8422
DOI:10.48550/arxiv.1305.1296