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. PHYS REV B, 81. -. ISSN 1098-0121Full text not available from this repository.
have investigated single grain boundaries (GBs) isolated in coated conductors produced by metal-organic deposition. When a magnetic field is swept in the film plane, an angle-dependent crossover from boundary to grain limited critical current density J(c) 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.
|Additional Information:||Related urls = http://prb.aps.org/toc/PRB/v81/i17|
|Uncontrolled Keywords:||CRITICAL-CURRENT DENSITY YBCO FILMS YBA2CU3O7-DELTA BICRYSTALS TRANSPORT MEASUREMENTS SUPERCONDUCTING TAPES CRITICAL CURRENTS MICROSTRUCTURE WIRES TEM|
|Divisions:||Div C > Materials Engineering|
|Depositing User:||Cron Job|
|Date Deposited:||04 Nov 2011 15:56|
|Last Modified:||21 Oct 2013 01:09|
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