Abstract
The current transfer length in compositeMgB2 wires with different metallic sheaths and filament numbers was analysed. Theelectric potential gradient along the wire in the vicinity of the current contact wasmonitored as a function of transport current in various external magnetic fields up to14 T. In all samples the characteristic current transfer length is of the order of amillimetre, varying with detailed sheath composition in the range 0.35–2 mm.For the wires with a clear reaction layer at the filament/matrix interface, theelectrical resistivity of the material constituting such a barrier was estimated.
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