CUED Publications database

Origin of stable critical current densities to high applied magnetic fields in ceria doped YBCO superconductors

Missak Swarup Raju, P and Pavan Kumar Naik, S and Devendra Kumar, N and Rajasekharan, T and Seshubai, V (2014) Origin of stable critical current densities to high applied magnetic fields in ceria doped YBCO superconductors. International Journal of ChemTech Research, 6. pp. 1699-1701. ISSN 0974-4290

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Abstract

Present work is focused on understanding various defects and their effectiveness in pinning the flux lines at different applied magnetic fields. Nano-particle of Ceria were added to YBa 2 Cu 3 O 7-x /Y 2 BaCuO 5 (Y211) composite synthesized through preform optimized infiltration growth process in 2, 5 and 10 weight % and Critical current densities (J c ) in these composites were measured at 65 and 77 K. The micrographs obtained on these composites at different magnifications indicate refinement in Y-211 particle size and presence of defects in various length scales, starting from few nanometres to few microns. It has been proposed that the current density obtained in superconducting samples can be correlated to the size of the flux pinning defects occurring in them which is indicated by peak field where maximum pinning occurs. The samples in the present study exhibited a stable J c values to high fields due to the presence of multiple peak fields. The present work brings fourth the origin of such stable J c to high magnetic fields and their correlation with the observed flux pinning centers.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:25
Last Modified: 16 Nov 2017 02:19
DOI: