Rani, Poonam and Jha, Rajveer and Awana, V. P. S. (2013) AC Susceptibility Study of Superconducting YBa2Cu3O7:Ag-x Bulk Composites (x=0.0-0.20): The Role of Intra and Intergranular Coupling. Journal of Superconductivity and Novel Magnetism, 26 (7). pp. 2347-2352. ISSN 1557-1939

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Abstract

We report the effect of silver addition on superconducting performance of bulk YBCO (YBa2Cu3O7) superconductor. All the studied samples are prepared by conventional solid-state reaction method. Rietveld fitted X-ray diffraction data confirmed the single phase formation for all the studied samples. Detailed AC susceptibility measurements as a function of driven AC amplitude (1 Oe-17 Oe) of these samples revealed the enhancement of grains coupling with increasing Ag content in YBCO + Ag-x composite system. 10 wt% Ag added YBCO superconductors exhibited the optimal intergranular coupling. The Scanning Electron Microscopy (SEM) observations indicate an increase in the grains connectivity in terms of narrow grain boundaries for doped samples. The average grain size is found to increase with Ag doping. It is concluded that limited addition of Ag in bulk YBCO superconductor significantly improves the grains coupling and, as a result, the optimal superconducting performance. YBCO + Ag composites could prove to be potential candidates for bulk superconducting applications of the studied high-T-c system.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	28 May 2020 11:17
Last Modified:	28 May 2020 11:17
URI:	http://npl.csircentral.net/id/eprint/2989

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