The onset of full coupling in multi-filament superconducting tapes exposed to an alternating external magnetic field

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Oomen, M.P. and Rieger, J. and Leghissa, M. and Rabbers, J.J. and Haken ten, B. (2000) The onset of full coupling in multi-filament superconducting tapes exposed to an alternating external magnetic field. Physica C: Superconductivity, 340 (2-3). pp. 87-92. ISSN 0921-4534

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Abstract:At high amplitudes and frequencies of the external magnetic field, the superconducting filaments in a composite conductor are fully coupled. This causes a high magnetisation loss. Methods to decouple the filaments are well known for the low-Tc superconductors and have recently been applied also to high-Tc composites. In this paper, expressions are derived for the magnetic-field amplitude and frequency where full coupling sets in, as well as for the twist length required for decoupling the filaments in a general rectangular composite. A comparison is made with other expressions found in the literature. The filaments in a typical Bi-2223/Ag tape in parallel magnetic fields are decoupled just by twisting. In perpendicular fields a high transverse resistivity is required to decouple the filaments and decrease the magnetisation loss.
Item Type:Article
Copyright:© 2000 Elsevier
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/74229
Official URL:http://dx.doi.org/10.1016/S0921-4534(00)01338-1
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Metis ID: 128722