Magnetic shielding by Y1Ba2Cu3O(7-delta) thick films
Abstract
The magnetic shielding properties of YBCO thick-film shielding structures have been calculated using the Bean model, and these numerical results are compared to measured data. The numerical results were obtained with a three-dimensional finite-element code that performed a nonlinear, transient analysis of the superconducting material as a function of applied magnetic field. The superconducting properties of the Y1Ba2Cu3O(7-delta) (YBCO) are included in this model by defining a nonlinear response of the high-temperature superconductor (HTS) material to the applied field. The measurements were performed on superconducting, melt textured thick YBCO films deposited on cylindrical and planar substrates, which together formed a closed shielding structure. The YBCO shields were measured at various temperatures from 12 K up to Tc. At 50 K these shields were found to completely shield a centrally placed magnetic probe up to an external field of 5 G.
- Publication:
-
IEEE Transactions on Applied Superconductivity
- Pub Date:
- March 1993
- DOI:
- 10.1109/77.233702
- Bibcode:
- 1993ITAS....3..189O
- Keywords:
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- Magnetic Properties;
- Magnetic Shielding;
- Superconducting Films;
- Thick Films;
- Ybco Superconductors;
- Diamagnetism;
- Magnetization;
- Electronics and Electrical Engineering