Strong pinning in very fast grown reactive co-evaporated GdBa2Cu3O7 coated conductors
- 등재 SCIE
- 발행기관 AMER INST PHYSICS
- 발행년도 2014
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000109686
- 본문언어 영어
- Published As http://dx.doi.org/10.1063/1.4893339
초록/요약
We report on compositional tuning to create excellent field-performance of J(c) in "self-doped," GdBa2Cu3O7-y (GdBCO) coated conductors grown by ultrafast reactive co-evaporation. In order to give excess liquid and Gd2O3, the overall compositions were all Ba-poor and Cu-rich compared to GdBCO. The precise composition was found to be critical to the current carrying performance. The most copper-rich composition had an optimum self-field J(c) of 3.2 MA cm(-2). A more Gd-rich composition had the best in-field performance because of the formation of low coherence, splayed Gd2O3 nanoparticles, giving J(c) (77 K, 1 T) of over 1 MA cm(-2) and J(c) (77 K, 5 T) of over 0.1 MA cm(-2). (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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