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VOLUME 62 (1995) | ISSUE 11 | PAGE 873
Maximum in the temperature dependence of the critical current in bulk random Josephson networks
The superconducting properties of the metastable alloy Zn-Sb are studied in a set of intermediate states of a bulk sample during its transformation to the insulating state. As the temperature is lowered below the transition, the critical current rises till 0JTc, then drops and finally reaches the limiting value. The latter scales with the normal resistance of the sample as R~2, whereas at the maximum at 0JTc the scaling power is different, R^3'2. A comparison with the properties of small superconducting tunnel junctions is made. © 7995 American Institute of Physics.