Evidence for strong flux pinning by small, dense nanoprecipitates in a Sm-doped YBa 2 Cu 3 O 7-δ coated conductor

Xueyan Song, Zhijun Chen, Sang Ii Kim, D. Matthew Feldmann, David Larbalestier, Jodi Reeves, Yiyuan Xie, Venkat Selvamanickam

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Abstract

About 17 vol. % of ∼10 nm sized (Y,Sm)2 O3 precipitates have been developed in a metal-organic chemical vapor deposition grown Sm-doped Y Ba2 Cu3 O7-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.

Original languageEnglish
Article number212508
JournalApplied Physics Letters
Volume88
Issue number21
DOIs
StatePublished - 21 May 2006

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