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VOLUME 47 (1988) | ISSUE 11 | PAGE 585
Tunneling-effect measurement of the energy gap in superconducting crystals of the Bi-Sr-Ca-Cu-O system
The energy gap and its temperature dependence have been measured by a tunneling-effect method in single crystals of the Bi-Sr-Ca-Cu-O system. The results show that these samples contain two superconducting phases, with Tc = 65 and 28 K, for which the ratios 2Л(0)//сГс are 7.1 and 7.0, respectively. An x-ray structural analysis confirms the presence of two single-crystal phases in the samples.