Zq. Luo et al., A new method to determine j(c) in bulk superconductor from saturated diamagnetic field by magneto-optic imaging, PHYSICA C, 341, 2000, pp. 1465-1466
The diamagnetic field created by supercurrent will be saturated after super
conducting bulk sample is fully penetrated by the external magnetic field.
The critical current density of a sample could be determined from the satur
ated diamagnetic field, which is easily and precisely observed by magneto-o
ptic imaging.