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- W2013342426 abstract "AC losses are measured using the null calorimetric method on a silver–gold sheathed Bi-2223 tape. The dependencies on current and on frequency give the usual results, showing the predominance of hysteretic losses. After damaging the tape, the same measurements are repeated. Loss variations with current still follow a power law but with an increased coefficient. Furthermore, the loss now depends on the square root of the frequency. This result is attributed to the presence of cracks in the superconducting core. Some of them reduce locally the cross-section at a point where the transport current is shared nearly equally between the few remaining superconducting grains, and the silver–gold alloy. This explanation is supported by a micrograph of the peeled tape, which shows a thin layer of superconducting material adhering to the silver–gold alloy, even where large cracks are present. The comparison of critical current distributions, extracted from V–I characteristics of the tape before and after the damage, shows a broadening of the good condition peaks. Also a sharp peak at very low current appears and is attributed to a huge fracture in the core." @default.
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- W2013342426 date "1998-12-01" @default.
- W2013342426 modified "2023-10-14" @default.
- W2013342426 title "Manifestations of damage to a silver–gold alloy sheathed Bi-2223 tape through the AC losses and V–I characteristics" @default.
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- W2013342426 doi "https://doi.org/10.1016/s0921-4534(98)00438-9" @default.
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