Bi1.8Pb0.4Sr2-xBaxCa2.2Cu3Oy (x-0, 0.1, 0.2, 0.3) samples were prepared by a conventional solid state reaction method. The effect of Ba substitution at Sr site in Bi-2223 high-TC superconductors have been investigated by the XRD, SEM, dc electrical resistivity and ac susceptibility. XRD and SEM analysis indicated Ba substitution decreased temperature of 2223 phase formation. The highest 2223 phase fraction was obtained for the sample with x=0.1 (A1 sample). This phase decreased by increasing Ba concentration (x>0.1). Ba doping up to x=0.1 decreased impurity phases but doping more than 0.1 increased. Dc electrical resistivity data and ac susceptibility measurements showed the transition temperature of grains and grain boundaries (Tc , Tcj ) increased and the transition width (ΔTc ) decreased for A1 sample. This behavior can be described by decreasing impurity phases and increasing 2223 phase. Flux pinning force and intergranular critical current densities (Jcm ) of A1 sample increased. It was suggested it is because of a small precipitation of Ba in grain boundaries as effective pinning centers. Ba doping more than 0.1 reduced the intergranular coupling and increased weak link behavior by increasing impurity phases. It decreased Tcj , Jcm and flux pinning force.
Salamati,H. , Morshedloo,T. , Kameli,P. , Baghi,M. , Ahmadvand,H. , Abdolhosseini,E. and Sohrabi,D. (2019). The effect of Ba substitution at Sr site in Bi-2223 high-TC superconductors. Iranian Journal of Physics Research, 10(2), 77-81.
MLA
Salamati,H. , , Morshedloo,T. , , Kameli,P. , , Baghi,M. , , Ahmadvand,H. , , Abdolhosseini,E. , and Sohrabi,D. . "The effect of Ba substitution at Sr site in Bi-2223 high-TC superconductors", Iranian Journal of Physics Research, 10, 2, 2019, 77-81.
HARVARD
Salamati H., Morshedloo T., Kameli P., Baghi M., Ahmadvand H., Abdolhosseini E., Sohrabi D. (2019). 'The effect of Ba substitution at Sr site in Bi-2223 high-TC superconductors', Iranian Journal of Physics Research, 10(2), pp. 77-81.
CHICAGO
H. Salamati, T. Morshedloo, P. Kameli, M. Baghi, H. Ahmadvand, E. Abdolhosseini and D. Sohrabi, "The effect of Ba substitution at Sr site in Bi-2223 high-TC superconductors," Iranian Journal of Physics Research, 10 2 (2019): 77-81,
VANCOUVER
Salamati H., Morshedloo T., Kameli P., Baghi M., Ahmadvand H., Abdolhosseini E., Sohrabi D. The effect of Ba substitution at Sr site in Bi-2223 high-TC superconductors. Dear user; Recently we have changed our software to Sinaweb. If you had already registered with the old site, you may use the same USERNAME but you need to change your password. To do so at the first use, please choose, 2019; 10(2): 77-81.
