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Evidence for strong flux pinning by small, dense nanoprecipitates in a Sm-doped YBa2Cu3O7-δ coated conductor

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8 Author(s)
Song, Xueyan ; Applied Superconductivity Center, University of Wisconsin-Madison, Madison, Wisconsin 53706 ; Chen, Zhijun ; Kim, Sang-II ; Feldmann, D.Matthew
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About 17 vol. % of ∼10 nm sized (Y,Sm)2O3 precipitates have been developed in a metal-organic chemical vapor deposition grown Sm-doped YBa2Cu3O7-δ coated conductor. The precipitate spacing of ∼15 nm suggests strong vortex-precipitate pinning interactions, which are evidenced by a shift in the peak in the flux pinning force curve, an enhanced irreversibility field exceeding 8 T at 77 K, and a lack of temperature scaling of the flux pinning force over the temperature range of 65–82 K.

Published in:

Applied Physics Letters  (Volume:88 ,  Issue: 21 )

Date of Publication:

May 2006

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