Critical state of YBCO superconductors with artificially patterned holes

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...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2005-06, Vol.15 (2), p.2775-2778
Main Authors: Bartolome, E., Granados, X., Puig, T., Obrados, X., Reddy, E.S., Kracunovska, S.
Format: Article
Language:English
Subjects:
Applied sciences
Computer programs
COMPUTER SIMULATION
COMPUTERS
COPPER OXIDE
Critical current density
Critical state
CURRENT DENSITY
Electrical engineering. Electrical power engineering
Exact sciences and technology
Hall effect devices
Hall probes
High temperature superconductors
HOLES
magnetic Hall probe imaging
Magnetic materials
Magnetization
Materials
porous structures
REMANENCE
Simulation
Soft magnetic materials
Software
Superconducting magnets
Superconducting materials
SUPERCONDUCTIVITY
SUPERCONDUCTORS
YBCO
YBCO superconductors
Yttrium barium copper oxide
YTTRIUM OXIDE
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Summary: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 J/sub c//sup eff//Jc ratios agree nicely with the simulations.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2005.848210