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20 April 2024

» arxiv » 1007.2527

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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 ;
Date:	15 Jul 2010
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.
Source:	arXiv, 1007.2527
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