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The level of AC losses is still too high in Bi,Pb(2223) tapes to allow their use in many applications. Therefore the reduction of AC losses in Bi,Pb(2223) is a key factor for their economical viability. The reduction of AC losses can be achieved by twisting of the tapes, alloying of the sheath or introducing a resistive barrier between the filaments. Up to now, the lowest value ever reported for a...
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