Applied Physics Letters · 2009 · 115 citations · 9 references
Superconducting MaterialMagnetic PropertiesEngineeringThin Film Process TechnologyEnhanced Flux PinningSuperconductivityHigh Tc SuperconductorsThin Film ProcessingMaterials ScienceHigh-tc SuperconductivityPhysicsOxide ElectronicsBazro3 NanocolumnsSurface ScienceApplied PhysicsOptimized Mocvd ConditionsThin FilmsMagnetic Field OrientationsChemical Vapor Deposition
We have formed BaZrO3 nanocolumns and (Gd,Y)2O3 nanoprecipitates in reel-to-reel metal organic chemical vapor deposition (MOCVD) processed (Gd,Y)Ba2Cu3O7−x coated conductors and increased the critical currents (Ic) of the conductors in applied magnetic fields to remarkable levels. A (Gd,Y)Ba2Cu3O7−x tape of 1 m in length with 6.5% Zr-additions and 30% composition rich in both Gd and Y showed Ic values of 813 A/cm width at (self-field, 77 K) and above 186 A/cm width at (1 T, 77 K). The strongly enhanced flux pinning over a wide range of magnetic field orientations can be attributed to the bidirectionally aligned defect structures of BaZrO3 and (Gd,Y)2O3 created by optimized MOCVD conditions.
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A. Goyal, Sang Yull Kang, Keith J. Leonard et al. · Superconductor Science and Technology · 2005 · 463 citations
Superconducting Material, Engineering, Magnetic Materials +26
High-Performance High- <i>T</i> <sub>c</sub> Superconducting Wires
Sang Yull Kang, A. Goyal, Jia Li et al. · Science · 2006 · 420 citations