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In-plane London penetration depths near the critical temperature of Tl2Ba2Ca n−1Cu n O2n+4 and (Bi, Pb)2Sr2Ca n−1 Cu n O2n+4 (n=2,3)

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Zeitschrift für Physik B Condensed Matter

Abstract

From isothermalM(H) curves nearT c , measured on polycrystalline Tl2Ba2Ca n−1Cu n O2n +4 and (Bi, Pb)2Sr2Ca n−1Cu n O2n+4 (n=2,3) samples, we deduce the in-plane penetration depths λab as functions of temperature. An estimate according to the BCS weak-coupling clean-limit fit, which produces the data nearT c very well, yields λab(0)=3100 Å, 2320 Å 2210 Å, and 1960 Å for Bi2Sr2CaCu2O8, Bi1.6Pb0.4Sr2Ca2Cu3O10, Tl2Ba2CaCu2O8, and Tl2Ba2Ca2Cu3O10, respectively. A comparison between strong-coupling and weak coupling fitting curves clearly favours the weak-coupling temperature dependence of λab nearT c .

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  1. Laboratorium für Festkörperphysik ETHZ, CH-8093, Zürich, Switzerland

    A. Schilling, F. Hulliger & H. R. Ott

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  1. A. Schilling
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  2. F. Hulliger
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  3. H. R. Ott
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Schilling, A., Hulliger, F. & Ott, H.R. In-plane London penetration depths near the critical temperature of Tl2Ba2Ca n−1Cu n O2n+4 and (Bi, Pb)2Sr2Ca n−1 Cu n O2n+4 (n=2,3). Z. Physik B - Condensed Matter 82, 9–13 (1991). https://doi.org/10.1007/BF01313980

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  • DOI: https://doi.org/10.1007/BF01313980

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