Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
69 (1991), S. 2740-2742
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The field and the time dependencies of trapped magnetic field, Btr(He) and Btr(t), at 77 K in solid and hollow cylinders of YBa2Cu3O7−y have been investigated. The plateaus in plots Btr(He) are observed for all the investigated cylinders. In a short hollow cylinder we observed a negative trapped field. It is very unusual and never observed before. Various time dependencies of Btr(t) are obtained: following a logarithmic law or remaining constant. Again in the case of hollow cylinder, an unexpected time dependence of Btr(t) is demonstrated. Instead of a decay, the trapped field increases with time after the applied field is switched off. However, these "anomalous'' phenomena can be explained most naturally by the weak link granular superconductivity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.348630
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