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

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
Faculty:	Science and Technology (TNW)
Research Group:	Low Temperatures - Biomagnetism (LT)
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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