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

Appl. Phys. Lett. 97, 052504 (2010); http://dx.doi.org/10.1063/1.3470101 (3 pages)

Inverted hysteresis and giant exchange bias in La0.7Sr0.3MnO3/SrRuO3 superlattices

M. Ziese1, I. Vrejoiu2, and D. Hesse2

1Division of Superconductivity and Magnetism, University of Leipzig, 04103 Leipzig, Germany
2Max Planck Institute of Microstructure Physics, 06120 Halle, Germany

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(Received 7 June 2010; accepted 7 July 2010; published online 3 August 2010)

The magnetization reversal mechanisms in a La0.7Sr0.3MnO3/SrRuO3 superlattice with ultrathin individual layers were studied. Due to the strong exchange bias between La0.7Sr0.3MnO3 and SrRuO3 layers inverted hysteresis loops were observed at temperatures below 62 K; at higher temperatures the superlattice showed an unconventional reversal mechanism with the magnetically hard SrRuO3 layers switching first on reducing the magnetic field from saturation. These observations were corroborated by micromagnetic simulations and were interpreted as arising from interfacial Bloch walls.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

exchange interactions (electron), lanthanum compounds, magnetic domain walls, magnetic hysteresis, magnetic superconductors, magnetic switching, magnetisation reversal, micromagnetics, strontium compounds, superconducting superlattices

PACS

  • 74.25.Ha

    Magnetic properties including vortex structures and related phenomena

  • 75.60.Jk

    Magnetization reversal mechanisms

  • 74.70.-b

    Superconducting materials other than cuprates

  • 74.78.Fk

    Multilayers, superlattices, heterostructures

  • 75.30.Et

    Exchange and superexchange interactions

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3470101

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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