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http://www.sciencedirect.com/science/article/pii/092145349090538P https://doi.org/10.1016/0921-4534(90)90538-P

has been cited by the following article:

• TITLE: Investigation of Niobium (Nb) Substitution on Structural and Superconducting Properties of (Bi, Pb)-Based Superconductors

  AUTHORS: Reza Asghari, Hasan Sedghi, Leyla Çolakerol Arsalan, Hamid Naghshara

  KEYWORDS: H-T Superconductors, Bi-2223 Phase, Bi-2212 Phase, Bi-2201 Phase, X-Ray Diffraction

  JOURNAL NAME: Advances in Materials Physics and Chemistry, Vol.7 No.7, July 25, 2017

  ABSTRACT: In this study, the effects of Nb substitution on the Bi-based superconducting materials have been investigated. The X-ray diffraction measurement indicated coexistence of Bi-2212, Bi-2223 phases and some impurity phases of CuO, CuNb2O6, CaNb2O6, CaCuO2, and Sr5Nb5O16. With increasing Nb content, impurity phases consistent with the Nb element appeared in the samples. Also with increasing Nb content, the Bi-2223 phase of samples gradually was decreased and in contrast, the Bi-2212 phase was increased. From the SEM, results have been seen that with increasing of Nb contents, the crystal structure of the samples was slightly changed because of the disrupted grain growth. From the electrical resistivity measurements, it has been found that with increasing of Nb contents, critical temperature decreases and the superconducting transition width (ΔT) increases. Estimated critical current density showed that Jc decreases with increasing Nb content, as expected.