Liyanawaduge, N. P. and Kumar, Anuj and Jha, Rajveer and Karunarathne, B. S. B. and Awana, V. P. S. (2012) High field magneto-transport and magnetization study of Y1-xCaxBa2Cu3O7-delta (x=0.00-0.25). Journal of Alloys and Compounds, 543. pp. 135-141. ISSN 0925-8388

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Abstract

We report DC isothermal magnetization, global critical current density (J(C)), Intra-grain critical current density (J(c)(intra)) and resistive upper critical field (B-c2) of polycrystalline Y1-xCaxBa2Cu3O7-delta (YBCO); x = 0.00, 0.05, 0.10, 0.15, 0.20 and 0.25. Ca doping at Y sites in YBCO superconductor results in flux pinning property, which can enhance the critical current densities and upper critical fields. J(C) and J(c)(intra) are experimentally calculated through DC isothermal magnetization measurement (M-H), employing the well known Bean's critical model. It is observed that both type of current densities (global and intra) enhance in lower doped (5%) samples and can be accounted in terms of reaching maximum of pinning centers and improved grain couplings nature. The upper critical field (B-c2) increases with Ca content being consistent with enhanced grain coupling nature of doped samples.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Materials Science Metallurgy & Metallurgical Engineering Physical Chemistry/Chemical Physics
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	12 Mar 2020 11:12
Last Modified:	12 Mar 2020 11:12
URI:	http://npl.csircentral.net/id/eprint/3547

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