CUED Publications database

Individual grain boundary properties and overall performance of metal-organic-deposition coated conductors

Weigand, M and Speller, SC and Hughes, GM and Rutter, NA and Lozano-Perez, S and Grovenor, CRM and Durrell, JH (2010) Individual grain boundary properties and overall performance of metal-organic-deposition coated conductors. Physical Review B, 81. 174537-.

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Abstract

We have investigated single grain boundaries (GBs) isolated in coated conductors produced by Metal-Organic Deposition (MOD). When a magnetic field is swept in the film plane, an angle-dependent crossover from boundary to grain limited critical current density Jc is found. In the force-free orientation, even at fields as high as 8 T, the GBs still limit Jc. We deduce that this effect is a direct consequence of GB meandering. We have employed these single GB results to explain the dependence of Jc of polycrystalline tracks on their width: in-plane measurements become flatter as the tracks are narrowed down. This result is consistent with the stronger GB limitation at field configurations close to force-free found from the isolated boundaries. Our study shows that for certain geometries even at high fields the effect of GBs cannot be neglected.

Item Type: Article
Uncontrolled Keywords: cond-mat.supr-con cond-mat.supr-con
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:43
Last Modified: 08 Dec 2014 02:37
DOI: 10.1103/PhysRevB.81.174537