Abstract:Abstract-Using an electrochemical bath copper and nickel metals and alloys are removed in multifilamentary MgB2 conductors to leave single MgB2 filaments surrounded by a Nb sheath. Starting from a 0.55 mm 36 filament diameter conductor, the etched filaments are 60 microns in diameter. Seven wires were characterized by transport critical current measurement, and one investigated further by resistivity when progressively etched. Their radial location in the original multifilamentary wire structure is then used t… Show more
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