Title :
Critical state of YBCO superconductors with artificially patterned holes
Author :
Bartolomé, E. ; Granados, X. ; Puig, T. ; Obrados, X. ; Reddy, E.S. ; Kracunovska, S.
Author_Institution :
Instituto de Ciencia de Materiales de Barcelona, CSIC, Bellaterra, Spain
fDate :
6/1/2005 12:00:00 AM
Abstract :
The magnetic behavior of melt-textured YBCO materials containing columnar holes has been systematically investigated with the help of a new "current-tracer" software based on the critical state model, and magnetic Hall probe imaging. The influence of the different geometrical distribution of holes, hole size and hole density on the remanent magnetization profiles and the effective-to-local critical current density ratio is discussed. For the single-crystalline YBCO samples with artificially patterned holes studied, the measured magnetization maps and Jceff/Jc ratios agree nicely with the simulations.
Keywords :
barium compounds; critical current density (superconductivity); high-temperature superconductors; hole density; melt texturing; remanence; yttrium compounds; YBCO superconductors; YBa2Cu3O7; columnar holes; critical current density ratio; critical state model; current-tracer software; geometrical distribution; high-temperature superconductors; hole density; hole size; magnetic Hall probe imaging; magnetization maps; melt-textured YBCO materials; porous structures; remanent magnetization profiles; single-crystalline YBCO; Critical current density; Hall effect devices; High temperature superconductors; Magnetic materials; Magnetization; Soft magnetic materials; Superconducting magnets; Superconducting materials; Superconductivity; Yttrium barium copper oxide; Critical state; YBCO; high-temperature superconductors; magnetic Hall probe imaging; porous structures;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.848210
