Superconducting and normal state parameters of Bi2.2Sr2Ca0.8Cu2O8+δ single crystals: A comparison with Ba2YCu3O7

B. Batlogg, T. T.M. Palstra, L. F. Schneemeyer, R. B. Van Dover, R. J. Cava

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Magnetic and magnetotransport properties were studied on Bi2.2Sr2Ca0.8Cu2O8+δ single crystals. The normal state resistivity in the a-b plane varies linearly with temperature and extrapolates to zero at T = 0. The slopes of the upper critical field are −4.5+1(−0.55) T/K for H perpendicular (parallel) to the c-axis. The coherence length is calculated to be ≈30A˚in the a-b plane but only ≈A˚perpendicular to it. ξc is thus shorter than the 12A˚spacing between the Cu-O double layers. From Hc1 and Hc2 data, the Sommerfeld parameter γ is deduced.

Original languageEnglish
Pages (from-to)1062-1066
Number of pages5
JournalPhysica C: Superconductivity and its applications
StatePublished - 1 Jan 1988


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