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Magneto-optical imaging of transport currents in YBa2Cu 3O7-x on RABiTSTM

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11 Author(s)
Feldmann, D.M. ; Appl. Supercond. Center, Wisconsin Univ., Madison, WI, USA ; Reeves, J.L. ; Polyanskii, A.A. ; Goyal, A.
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Two YBa2Cu3O7-x (YBCO) on RABiTS TM conductors with high Jc (0 T, 77 K) values of 2.3 and 2.4 MA/cm2 were scribed by laser cutting to constrict supercurrent flow. On one of these tracks, magneto-optical (MO) imaging of the self-field produced by a transport current directly demonstrates the percolative nature of the current flow. Using backscattered electron Kikuchi pattern (BEKP) analysis, we have found that Ni grain boundaries (GBs)>5° generally introduce GBs in the YBCO that have lower J c values than the intra-grain

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:11 ,  Issue: 1 )

Date of Publication:

Mar 2001

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