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London penetration depth in Bi-based high-Tc compounds

M Weber, A Amato, P Birrer, V N Duginov, V G Grebinnik, F N Gygax, S Kapusta, B F Kirillov, E Lippelt, H Maletta, V G Olshevsky, A V Pirogov, V Yu Pomjakushin, A N Ponomarev, A Schenck, V G Storchak and V A Zhukov

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The muon spin relaxation was measured in the high-Tc superconductors Bi2(Sr1.3Ca0.7)CuO6.2, Bi2Sr2CaCu2O8.16, (Bi1.85Pb0.15)Sr2CaCu2O8.18 and (Bi1.83Pb0.25)Sr1.97Ca1.97 Cu3.07Ox. The data were analysed in order to determine the London penetration depth lambda ab parallel to the basal plane. In all investigated samples lambda ab revealed a temperature dependence which can be explained with the framework of conventional BCS theory in the weak coupling limit.


PACS

74.25.Ha Magnetic properties

76.75.+i Muon spin rotation and relaxation

74.72.Hs Bi-based cuprates

Subjects

Superconductivity

Condensed matter: electrical, magnetic and optical

Dates

Issue 1S (January 1991)



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