Abstract
A new method was developed to elaborate (Bi,Pb) 2Sr 2CaCu 2O x (Pb-2212) single crystals. The new process makes use of a progressive increase of the oxygen chemical potential in gaseous phase at a constant temperature 875°C below the incongruent melting temperature ( T=884°C) of the Pb-2212. The composition of this crystal is homogeneous and very close to the stoichiometric composition. Structure characterization of a single crystal was realized by measuring the (0 0 l) X-ray diffraction intensity. The superconducting temperature T c(0)=90 K with a sharp transition width (10–90% level) between 5 and 10 K was determined from resistivity and DC susceptibility measurments.
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