Liyanawaduge, N. P. and Singh, Shiva Kumar and Singh, Shiva Kumar and Jha, Rajveer and Karunarathne, B. S. B. and Awana, V. P. S. (2012) Magnetization and magneto-resistance in Y (Ba1-xSrx)(2) Cu3O7-delta (x=0.00-0.50) superconductors. Superconductor Science and Technology , 25 (3). 035017-0350116. ISSN 0953-2048

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Here we present the magnetic properties and upper critical field (B-C2) of polycrystalline Y (Ba1-xSrx)(2) Cu3O7-delta superconductors, which are determined through detailed ac/dc susceptibility and resistivity under magnetic field study. All the samples are synthesized through the solid state reaction route. Reduction in the Meissner fraction (the ratio of field cooled to zero field cooled magnetization) is observed with increasing Sr content, suggesting the occurrence of flux pinning in the doped samples. The ac susceptibility and resistivity measurements reveal improved grain coupling in Sr substituted samples. Consequently the inter-grain critical current density (J(c)), upward curvature near T-c in the temperature dependence of the upper critical field (B-C2(T)), and B-C2 are enhanced. Both J(c) and B-C2 increase in lower Sr substitution (up to x = 0.10) samples followed by decrease for higher doping due to degradation in the effective pinning and grain coupling.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Institute of Physics.
Subjects: Applied Physics/Condensed Matter
Depositing User: Users 27 not found.
Date Deposited: 13 Mar 2020 11:34
Last Modified: 13 Mar 2020 11:34

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