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arXiv · 1007.2527

Reverse-domain superconductivity in superconductor-ferromagnet hybrids: effect of a vortex-free channel on the symmetry of I-V characteristics

A. Yu. Aladyshkin·D. Yu. Vodolazov·J. Fritzsche·R. B. G. Kramer·V. V. Moshchalkov
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Abstract

We demonstrate experimentally that the presence of a single domain wall in an underlying ferromagnetic BaFe_{12}O_{19} substrate can induce a considerable asymmetry in the current (I) - voltage (V) characteristics of a superconducting Al bridge. The observed diode-like 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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A. Yu. Aladyshkin, D. Yu. Vodolazov, J. Fritzsche, R. B. G. Kramer, V. V. Moshchalkov. 2010-07-15. Reverse-domain superconductivity in superconductor-ferromagnet hybrids: effect of a vortex-free channel on the symmetry of I-V characteristics. https://doi.org/10.1063/1.3474622

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