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Sketch of a square-shaped film partly covered with of gold.
Magneto-optical image of the sample of Fig. 1 after zero-field cooling to in an external magnetic field of . The scale bar is . The geometry of the sample and some avalanches are emphasized in the right image.
Sketch of the semicircular geometry. The solid lines in the bottom image represent the current stream lines in the critical state.
Current flow in the rectangular film obtained by quantitative magneto-optics. The upper image shows the flux density distribution with additional current stream lines, the lower image depicts the modulus of . The white scale bar refers to .
Bending of avalanches of negative magnetic flux at the semicircular border, the scale bar is . In the bottom image, the traces are highlighted where three different cases of propagation occur.
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