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Size and shape dependence of the exchange-bias field in exchange-coupled ferrimagnetic bilayers

  • Parameters tuning exchange bias in polycrystalline samples and magnetic configurations
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Abstract.

Exchange biasing was studied in an exchange-spring system consisting of two ferrimagnetic films with different coercivity. Magnetite and Co-Fe ferrite were chosen as the soft and hard magnetic bilayer components, respectively. The samples were epitaxially grown on MgO single crystal substrates by pulsed laser deposition. The exchange-bias field was investigated as a function of system size and shape, magnetic field direction and magnetization reversal in the hard layer. A clear dependence of the exchange-bias field on the sample size and shape was found. This was attributed to an interplay between exchange and dipolar energies. Micromagnetic simulations agree with the experimental results.

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Authors and Affiliations

  1. Division of Superconductivity and Magnetism, University of Leipzig, Linnéstrasse 5, 04103, Leipzig, Germany

    M. Ziese, R. Höhne, A. Bollero, H.-C. Semmelhack & P. Esquinazi

  2. Institute for Surface Modification, 04318, Leipzig, Germany

    K. Zimmer

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  1. M. Ziese
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  2. R. Höhne
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  3. A. Bollero
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  4. H.-C. Semmelhack
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  5. P. Esquinazi
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  6. K. Zimmer
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Correspondence to M. Ziese.

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Ziese, M., Höhne, R., Bollero, A. et al. Size and shape dependence of the exchange-bias field in exchange-coupled ferrimagnetic bilayers. Eur. Phys. J. B 45, 223–230 (2005). https://doi.org/10.1140/epjb/e2005-00177-4

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  • DOI: https://doi.org/10.1140/epjb/e2005-00177-4

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