Schematic
of Mo image under an applied magnetic field.
a) An applied field induces currents to flow in the sample.
b) Sample with indictor film placed on top. The intensity (brightness)
of the MO image reflects the magnitude of the local magnetic
field. The indicator film produces an intensity map on the Bz
component of the magnetic field in a plane just above the surface
of the sample.
c) a 3D plot of the Bz component of the magneti field imaged
in b)
Schematic
of MO imaging under an applied transport current.
a) An applied transport current (black arrows) in a superconducting
sample (green) produces a magnetic field which wraps around
the sample (purple arrows).
b) When the MO indicator film is placed on top of the sample,
only the Bz component of the magnetic field is seen. Here the
indicator film images the Bz component of the magnetic field
in a plane just above the surface of the sample.
c) a 3D plot of the Bz component of the magnetic field in the
plane of the indicator film in b). Not the different colors
in the MO image correspond to different direction of magnetic
field.
MO
image of YBCO on a deformation textured substrate. The influence
of the granular substrate can clearly be seen. For this image
the sample was cooled to 77K in the absence of a magnetic field,
and then a field of 60mT was applied.
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