The structure of a series of highly Al-doped superconducting Y(RE)-123 (RE = rare earth element) single crystals was investigated by XRD and NMR methods. On the basis of the data obtained by the structural investigations combined with the studies of magnetic and optical properties, the formation of various superstructures in the samples of pseudo-tetragonal symmetry has been discussed. The correlation between the carrier concentration and T-c-values has been determined. The superconductivity (at 70 K) was indicated even at the 2/3 and 1/3 Al substitution for Cu in the basal and CuO2 planes, respectively, in the phase presumably of a perovskite-like structural type.

Structural features and superconductivity of Al-doped Y(RE)-123-type single crystals / BOCELLI G.; RIGHI L.; LEONYUK L.; LEONYUK N.; ZHILYAEVA A.; BABONAS G.J.; REZA A.; SZYMCZAK P.; BARAN M.; SHERRIFF B.. - In: SUPERCONDUCTOR SCIENCE & TECHNOLOGY. - ISSN 0953-2048. - 12:12(1999), pp. 1150-1155. [10.1088/0953-2048/12/12/326]

Structural features and superconductivity of Al-doped Y(RE)-123-type single crystals

RIGHI, Lara;
1999

Abstract

The structure of a series of highly Al-doped superconducting Y(RE)-123 (RE = rare earth element) single crystals was investigated by XRD and NMR methods. On the basis of the data obtained by the structural investigations combined with the studies of magnetic and optical properties, the formation of various superstructures in the samples of pseudo-tetragonal symmetry has been discussed. The correlation between the carrier concentration and T-c-values has been determined. The superconductivity (at 70 K) was indicated even at the 2/3 and 1/3 Al substitution for Cu in the basal and CuO2 planes, respectively, in the phase presumably of a perovskite-like structural type.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/1460150
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