Abstract
We demonstrate experimentally that the presence of a single domain wall in an underlying ferromagnetic BaFe12O19 substrate can induce a considerable asymmetry in the current (I)–voltage (V) characteristics of a superconducting Al bridge deposited on top of the substrate. The observed diodelike effect, i.e., polarity-dependent critical current, is associated with the formation of a vortex-free channel inside the superconducting area which increases the total current flowing through the superconducting bridge without dissipation. The vortex-free region appears only for a certain sign of the injected current and for a limited range of the external magnetic field.
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