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Superconductivity in the Bi<sub>2</sub>Ln<sub>x</sub>Ca<sub>3-x</sub>Cu<sub>2</sub>O<sub>z</sub> (Ln=La, Pr, Nd, Sm, Eu and Gd) Systems
47
Citations
11
References
1989
Year
Superconducting MaterialEngineeringX-ray Diffraction MethodsNovel SuperconductorsSuperconductivityQuantum MaterialsHigh Tc SuperconductorsOxide SuperconductorsSuperconducting DevicesLow-temperature SuperconductivityMaterials ScienceHigh-tc SuperconductivityPhysicsSolid-state PhysicNew FamilyHigh-temperature SuperconductivityApplied PhysicsUnconventional SuperconductivityCondensed Matter PhysicsQuantum Superconductivity
A new family of oxide superconductors of Bi 2 Ln x Ca 3- x Cu 2 O z (Ln=La, Pr, Nd, Sm, Eu and Gd) has been examined by means of the electrical resistivity and the X-ray diffraction methods. All the ceramics exhibited superconductivity, and the highest zero resistivity temperature obtained among them was about 45 K for Ln=Pr. The X-ray powder diffraction study showed that these ceramics had a similar crystal structure to that of the 2212 phase (Bi 2 Sr 2 CaCu 2 O y ) and that the single phase was almost attained at the nominal composition of x =0.5 (Ln=La, Pr, Nd and Sm) and 0.6 (Ln=Eu and Gd).
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