B. Czyzak et al., THE MICROWAVE-ABSORPTION AND FLUX TRAPPING IN HIGHLY ORIENTED YBA2CU3O69 CERAMICS, Journal of physics. Condensed matter, 5(36), 1993, pp. 6753-6760
Microwave absorption was measured in highly oriented ceramic samples o
f YBa2Cu3O6.9 obtained by melt-quenching-melt growth solidification. M
easurements on samples cooled down to the superconducting state in an
external magnetic field permitted analysis of magnetic flux trapping.
The character of the magnetic flux trapping has been found to be isotr
opic despite distinct structural anisotropy of the studied materials c
onfirmed by the results of x-ray analysis. An attempt to interpret the
results within the model of intergrain Josephson junctions has been m
ade.