Strongly coupled critical current density values achieved in Y1Ba2Cu3O7−δ coated conductors with near-single-crystal texture
- 23 June 2003
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 82 (25) , 4519-4521
- https://doi.org/10.1063/1.1584783
Abstract
One of the most intensely researched subjects in the development of YBa 2 Cu 3 O 7−δ (YBCO)-based coated conductors is the methodology for achieving ever-sharper film texture on flexible metal substrates. This is a critical issue due to the intrinsic weak-link behavior that results in depressed critical current density (J c ) in polycrystallineYBCO. Using ion-beam-assisted deposition of magnesium oxide, we have achieved YBCO texture on superalloy substrates approaching that on single-crystal oxide substrates. This advance has allowed us to fabricate coated conductor samples with J c s that are as high as for films on oxide crystals; for example, >2 MA/cm2 (75 K, self-field) at a YBCO thickness of ∼1.5 μm.Keywords
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