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YBa2Cu3O7-delta/La1/3Ca2/3MnO3/La2/3Ca1/3MnO3 junctions with nominal thicknesses of 100, 7, and 80 nm respectively were fabricated by dc sputtering technique and their electrical properties determined.The superconducting gap-like structure was observed, suggesting a transport mechanism via elastic tunneling. On the other hand, for junctions with a barrier resistance of 30 Omega a pronounced zero-bias...
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