Structural and magnetic properties of NiS doped Bi-2212 superconductors

In this work we have studied the effect of NiS doping on the superconducting properties of the Bi-2212 (nominal composition Bi 2.1Sr 2.1Ca 0.8[(CuO) 1− x (NiS) x ] 2O 8+ δ ), superconductors. Our studies show that NiS doping stabilizes superconductivity in the system but all the NiS doped samples ga...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2001-05, Vol.354 (1), p.363-366
Main Authors: Albino Aguiar, J., Lima, C.L.S., Yadava, Y.P., Jardim, R.F., Montarroyos, E., Ferreira, J.M.
Format: Article
Language:English
Subjects:
Bi 2.1Sr 2.1Ca 0.8[(CuO) 1− x(NiS) x] 2O 8+ δ
Bi-2212 superconductors
NiS doping
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Summary:In this work we have studied the effect of NiS doping on the superconducting properties of the Bi-2212 (nominal composition Bi 2.1Sr 2.1Ca 0.8[(CuO) 1− x (NiS) x ] 2O 8+ δ ), superconductors. Our studies show that NiS doping stabilizes superconductivity in the system but all the NiS doped samples gave a T c lower than the superconducting transition temperature of pure Bi-2212 superconductors. It appears that NiS substitution for CuO planes and modification of the oxygen content due to S substitution on O places jointly produce strong localization of charge carriers and at the same time increase the hole concentration of the system. These combined phenomena occurring in the Bi 2.1Sr 2.1Ca 0.8[(CuO) 1− x (NiS) x ] 2O 8+ δ system are responsible for the deterioration of superconductivity of NiS doped Bi-2212 superconductors.
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(01)00101-0