Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
64 (1994), S. 241-243
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We have studied the spatial distribution of the critical current density in YBa2Cu3O7−δ ramp edge Josephson junctions using low-temperature scanning electron microscopy. Applying this technique allows the imaging of the critical current density distribution with a spatial resolution of about 1 μm. Our measurements show that the geometry of the ramp-edge junction eases the trapping of magnetic flux quanta in the YBa2Cu3O7−δ layer covering the ramp edge. These trapped flux quanta result in a spatially inhomogeneous magnetic field parallel to the barrier layer, which in turn results in a spatially modulated supercurrent density and an unusual magnetic field dependence of the critical current.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.111516
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