Temporal stability of circulating current in thin film Tl2Ba2CaCu2O8 and YBa2Cu3O7 |
| |
Authors: | Wheatley RW Hennessy MJ Hung Bin Zou |
| |
Affiliation: | Intermagnetics Gen. Corp., Latham, NY; |
| |
Abstract: | The temporal stability of trapped transport current in annular thin film Tl2Ba2CaCu2O8 (TBCCO) and YBa2Cu3O7 (YBCO) wafers has been accurately measured and has been found to be of suitable quality for the stringent requirements of nuclear magnetic resonance (NMR) magnets. No detectable decay, to the limit of the experimental apparatus (2*10-14 Ω), was detected in those wafers with transport current at or below the critical current density Jc. The critical current density, as previously determined from 12 μm meander lines, was confirmed in a wafer with a width of 1.9 cm. The profile of trapped magnetic field resulting from induced current was modeled in order to assess its effect on the uniformity of an NMR magnet |
| |
Keywords: | |
|
|