Abstract
Thermocompression bonding of aluminum to YBa2Cu3O7−x (YBCO) has been demonstrated. The superconductor is protected by a thin barrier layer of silver. The specific resistivity of the Al/Ag/YBCO interface was measured at 77 K as a function of current density and is below 3.2×10−5 Ω cm2 for electrode current densities of at least 400 A cm−2 . This technique provides a convenient means of cladding bulk superconducting ceramics with a strong, inexpensive, and highly conductive metal.
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