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Applied Physics Letters / Volume 97 / Issue 5 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 97, 052501 (2010); http://dx.doi.org/10.1063/1.3474622 (3 pages)

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

A. Yu. Aladyshkin1,2, D. Yu. Vodolazov2, J. Fritzsche1, R. B. G. Kramer1,3, and V. V. Moshchalkov1

1Institute for Nanoscale Physics and Chemistry (INPAC), K.U. Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
2Institute for Physics of Microstructures RAS, Nizhny Novgorod GSP-105, Russia
3Institut Néel, CNRS, Université Joseph Fourier, BP 166, 38042 Grenoble Cedex 9, France

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(Received 18 May 2010; accepted 12 July 2010; published online 2 August 2010)

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.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

aluminium, barium compounds, critical currents, ferromagnetic materials, interface magnetism, magnetic anisotropy, magnetic domain walls, superconducting thin films, type I superconductors

PACS

  • 74.25.F-

    Transport properties

  • 74.70.Ad

    Metals; alloys and binary compounds (including A15, MgB2, etc.)

  • 75.70.Cn

    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

  • 75.70.Kw

    Domain structure (including magnetic bubbles and vortices)

  • 75.30.Gw

    Magnetic anisotropy

  • 74.78.-w

    Superconducting films and low-dimensional structures

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3474622

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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