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Applicability of the Stoner-Wohlfarth Model for Ni-Fe Graded Thin Films

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Abstract

Fe-Ni graded films have been prepared by co-sputtering permalloy and Fe targets at different time-power sequences. Morpho-structural and magnetic investigations have been performed by transmission electron microscopy, Xray reflectometry, conversion electron Mössbauer spectroscopy and magneto-optic Kerr effect vector magnetometry, proving the thickness dependence of the properties. A magnetization reversal involving the displacement of Bloch-type walls is characteristic for a 115 nm thick Fe-Ni graded film whereas an in-plane coherent rotation of the spins, according to a Stoner-Wohlfarth mechanism was evidence for a 23 nm thick Fe-Ni graded film.

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Acknowledgment

The financial support through the Romanian program PCE-2012-4-0362 and the Core program PN09-450103 is highly acknowledged.

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Authors and Affiliations

  1. National Institute of Materials Physics, 077125, Bucharest-Magurele, Romania

    A. Kuncser, G. Schinteie, C. Ghica & V. Kuncser

  2. Faculty of Physics, Bucharest University, 077125, Bucharest-Magurele, Romania

    A. Kuncser & S. Antohe

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  1. A. Kuncser
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  2. G. Schinteie
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  3. C. Ghica
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  4. S. Antohe
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  5. V. Kuncser
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Correspondence to A. Kuncser.

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Kuncser, A., Schinteie, G., Ghica, C. et al. Applicability of the Stoner-Wohlfarth Model for Ni-Fe Graded Thin Films. J Supercond Nov Magn 28, 965–969 (2015). https://doi.org/10.1007/s10948-014-2684-z

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  • DOI: https://doi.org/10.1007/s10948-014-2684-z

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