NMR study of ¹⁷o in the superconductor Bi₂Sr₂CaCu₂O_8+x

A. Trokiner Laboratoire de Physique Thermique, U.R.A. CNRS 857, E.S.P.C.I. 10, rue Vauquelin 75231, Paris, Cedex 05, France

L. Le Noc Laboratoire de Physique Thermique, U.R.A. CNRS 857, E.S.P.C.I. 10, rue Vauquelin 75231, Paris, Cedex 05, France

R. Mellet C.N.E.T., 196, rue Henri Ravera 92220, Bagneux, France

A.-M. Pougnet C.N.E.T., 196, rue Henri Ravera 92220, Bagneux, France

D. Morin C.N.E.T., 196, rue Henri Ravera 92220, Bagneux, France

Y. M. Gao C.N.E.T., 196, rue Henri Ravera 92220, Bagneux, France

J. Primot C.N.E.T., 196, rue Henri Ravera 92220, Bagneux, France

J. Schneck C.N.E.T., 196, rue Henri Ravera 92220, Bagneux, France

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Abstract

¹⁷O NMR measurements in a powder sample of Bi₂Sr₂CaCu₂O_8+x in the normal as well as in the superconducting phase have allowed us to assign the two lines of the spectrum to the oxygen site in the SrO planes and in the CuO₂ planes. The absence of the expected BiO line is accounted for on the basis of the incommensurate superstructure existing in these compounds. The spectra obtained for T < T_c are analyzed.

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NMR study of ¹⁷o in the superconductor Bi₂Sr₂CaCu₂O_8+x

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NMR study of 17o in the superconductor Bi2Sr2CaCu2O8+x

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NMR study of ¹⁷o in the superconductor Bi₂Sr₂CaCu₂O_8+x