Wm. Woch et al., MIXED-STATE OF SOL-GEL Y-BA-CU-O TYPE HIGH-TEMPERATURE SUPERCONDUCTORS, Journal of magnetism and magnetic materials, 144, 1995, pp. 1311-1312
The microwave absorption and ac susceptibility vs. magnetic field and
temperature were measured for Y-Ba-Cu-O type high-T-c superconductors
which were prepared by the sol-gel method. Some characteristic fields
were found and their temperature dependences were measured. The grain
size and porosity effects on the penetration of a magnetic field into
the sample were also studied.