Characteristics of YBaCuO magnetic shields
Abstract
Magnetic shielding properties of YBaCuO tubes have been studied at temperatures of 77 K and 4 K. Shielding effectiveness was determined by measuring the magnetic field inside the tube in the presence of external magnetic fields. A high degree of shielding was achieved up to a critical external field determined by the critical current density of the material. Typically, this critical field is 23 Oe at 77 K extending up to 105 Oe at 4 K. Tubes made with material containing 10 percent silver exhibited much stronger flux pinning behavior when the external magnetic field started to penetrate the tubes. The tubes studied were effective in shielding a RF-biased SQUID for operation at 77 K.
- Publication:
-
IEEE Transactions on Magnetics
- Pub Date:
- March 1991
- DOI:
- 10.1109/20.133562
- Bibcode:
- 1991ITM....27.1874H
- Keywords:
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- Copper Oxides;
- Cryogenic Temperature;
- High Temperature Superconductors;
- Magnetic Shielding;
- Current Density;
- Magnetic Field Configurations;
- Radio Frequencies;
- Squid (Detectors);
- Electronics and Electrical Engineering