Applied Physics Letters · 1992 · 93 citations · 9 references
Superconducting MaterialEngineeringMagnetismSuperconductivityHigh Tc SuperconductorsMagnetic Flux LinesMolecular Beam EpitaxyEpitaxial GrowthThin Film ProcessingMaterials ScienceHigh-tc SuperconductivityY2o3 InclusionsSrtio3 SubstratesOxide ElectronicsSpintronicsEpitaxial Y2o3 InclusionsSputtered Yba2cu3o7 FilmsApplied PhysicsCondensed Matter PhysicsFilm GrowthThin Films
Y2O3 inclusions with typical sizes between 100 and 300 nm3, densely distributed (1016 cm−3) in sputtered YBa2Cu3O7 (YBCO) films on SrTiO3 substrates, have been identified by high-resolution electron microscopy. The precipitates exhibit either cuboid or needlelike shapes and grow epitaxially within and on top of YBCO. The dominant orientation relationship corresponds to a situation where the two-dimensional lattices are nearly coincident in the interfacial (001) plane. These precipitates may contribute to the generation of screw and edge dislocations. In addition, they provide a large number of potential pinning sites for magnetic flux lines, which may contribute to the observed high critical current densities.
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Screw dislocations in high-Tc films
Ch. Gerber, Dario Anselmetti, J. G. Bednorz et al. · Nature · 1991 · 413 citations
Critical currents and flux creep in melt processed high Tc oxide superconductors
M. Murakami, S. Gotoh, N. Koshizuka et al. · Cryogenics · 1990 · 296 citations
Critical Currents, Materials Science, Superconducting Material +11