Title :
Superconducting and microstructural properties of [001] tilt YBa 2Cu3O7-δ thick film grain boundaries on SrTiO3 bicrystal substrates
Author :
Li, Qiang ; Zhu, Y. ; Solovyov, V.F. ; Wiesmann, H.J. ; Suenaga, M.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
We present a study of superconducting and microstructural properties of [001] tilt YBa2Cu3O7-δ (YBCO) thick film grain boundaries (GB) on SrTiO3 bicrystal substrates prepared using a BaF2 ex-situ post deposition reaction process. For a 15° tilt boundary, multiple microbridges were patterned across the grain boundary at various locations. A large variation of local critical current density Jc was observed. Through local microstructural characterization of these GB bridges using transmission electron microscopy (TEM), a direct correlation of local GB Jc with structure is identified
Keywords :
barium compounds; critical current density (superconductivity); crystal microstructure; high-temperature superconductors; tilt boundaries; transmission electron microscopy; yttrium compounds; 15° tilt boundary; BaF2 ex-situ post deposition reaction process; SrTiO3; SrTiO3 bicrystal substrates; TEM; YBa2Cu3O7-δ; YBa2Cu3O7; [001] tilt grain boundaries; local critical current density; microstructural properties; multiple microbridges; superconducting properties; thick film; transmission electron microscopy; Bridges; Grain boundaries; High temperature superconductors; Microstructure; Optical films; Substrates; Superconducting epitaxial layers; Superconducting films; Thick films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
