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Title

Alternating magnetic field losses in high-Tc superconducting multifilament tapes with a mixed matrix of Ag and BaZrO3

Authors
Kwasnitza, K.
Clerc, St.
Published in Physica C: Superconductivity and Its Applications. 1998, vol. 299, no. 1-2, p. 113-124
Abstract Alternating magnetic field losses for the new (Bi, Pb)2Sr2Ca2Cu3O10 multifilament tapes with a mixed Ag–BaZrO3 matrix for coupling loss reduction have been measured at 77 K and at frequencies up to 100 Hz. Due to the presence of oxide barriers around the filaments, the effective transverse electrical resistivity in the matrix is increased by a factor of eight, with a corresponding modification of the frequency dependence of the coupling losses. This result is a very promising step in the development of low loss high-Tc superconductors for 50 Hz applications. For larger ΔB values, it seems feasible to reduce the coupling losses at 50 Hz to a tolerable level by both, applying high-resistive barriers and changing the conductor dimensions, away from the extremely flat tape geometry. A saturation loss criterion is derived for twisted flat multifilament tapes.
Keywords AC lossesBi-2223 high-Tc superconducting multifilament tapesAg–BaZrO3 mixed matrix
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KWASNITZA, K. et al. Alternating magnetic field losses in high-Tc superconducting multifilament tapes with a mixed matrix of Ag and BaZrO3. In: Physica C: Superconductivity and Its Applications, 1998, vol. 299, n° 1-2, p. 113-124. https://archive-ouverte.unige.ch/unige:107905

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Deposited on : 2018-09-17

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