Structural and superconducting properties of co-doped YBa2-xLaxCU3-xMxOz and La-free YBa2Cu3-xMxOz (M = Al, Zn) high-Tc superconductors

Two co-doped high-Tc superconducting systems, YBa2-xLaxCu3-xAlxOz and YBa2-xLaxCu3-xZnxOz (0 [el] x [el] 0.3), both of which have not been reported up to the present, were synthesized. The structural and superconducting properties have been investigated by X-ray diffraction (XRD) and DC magnetizatio...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2012-05, Vol.475, p.28-31
Main Authors: HAO, S. J, JIN, W. T, GUO, C. Q, ZHANG, H
Format: Article
Language:English
Subjects:
Aluminum
Condensed matter: electronic structure, electrical, magnetic, and optical properties
COPPER OXIDE
Diffraction
DOPING
Effects of crystal defects, doping and substitution
Exact sciences and technology
Magnetization
Physics
Solid solubility
SOLUBILITY
SUPERCONDUCTIVITY
SUPERCONDUCTORS
Transition temperature variations
YBCO superconductors
YTTRIUM OXIDE
Zinc
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Summary:Two co-doped high-Tc superconducting systems, YBa2-xLaxCu3-xAlxOz and YBa2-xLaxCu3-xZnxOz (0 [el] x [el] 0.3), both of which have not been reported up to the present, were synthesized. The structural and superconducting properties have been investigated by X-ray diffraction (XRD) and DC magnetization measurement. Comparing the properties of these co-doped systems with single-doped systems YBa2Cu3-xAlxOz and YBa2Cu3-xZnxOz, it shows that in the Al-single-doped YBCO system, the depression of the critical temperature (Tc) with doping is stronger than that in (La, Al)-co-doped system, however, in the Zn-single-doped system, the Tc descends slower than that in (La, Zn)-co-doped system. This is possibly due to the opposite change of the distance between the Ba site and the CuO2 plane induced by the La doping. Besides, the La doping has another effect of improving the solid solubility compared with the Al- or Zn-single-doped system.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2012.01.013