Abstract
We have performed a deliberate study on the transport properties of Y-123 thin films on bi-crystalline substrates containing low angle grain boundaries (LAGBs). By magneto-optical (MO) imaging we are able to map the magnetic field and current distribution of wide current bridges. A quantitative analysis of the distribution of currents over the entire grain boundary (GB) is presented. We discuss the effects of magnetic history on the transport properties of Y-123 thin films with LAGBs. The results are compared with artificially created two-dimensional (2D) current distributions.
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