A. Oral et al., VORTEX IMAGING IN SUPERCONDUCTING FILMS BY SCANNING HALL PROBE MICROSCOPY, Journal of low temperature physics, 105(5-6), 1996, pp. 1135-1140
We have used a low noise Scanning Hall Probe Microscope (SHPM) to stud
y vortex structures in superconducting films. The microscope has high
magnetic field (similar to 2.9 x 10(-8)T/root Hz at 77 K) and spatial
resolution, similar to 0.85 mu m. Magnetic field profiles of single vo
rtices in High T-c YBa2Cu3O7-delta thin films have been successfully m
easured and the microscopic penetration depth of the superconductor ha
s been extracted as a function of temperature. Flux penetration into t
he superconductor has been imaged in real time (similar to 8s/frame).