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Article Dans Une Revue Journal of Magnetism and Magnetic Materials Année : 2008

Monte Carlo investigation of the magnetic anisotropy in Fe/Dy multilayers

Etienne Talbot
Denis Ledue

Résumé

By Monte Carlo simulations in the canonical ensemble, we have studied the magnetic anisotropy in Fe/Dy amorphous multilayers. This work has been motivated by experimental results which show a clear correlation between the magnetic perpendicular anisotropy and the substrate temperature during elaboration of the samples. Our aim is to relate macroscopic magnetic properties of the multilayers to their structure, more precisely their concentration profile. Our model is based on concentration dependent exchange interactions and spin values, on random magnetic anisotropy and on the existence of locally ordered clusters that leads to a perpendicular magnetisation. Our results evidence that a compensation point occurs in the case of an abrupt concentration profile. Moreover, an increase of the noncollinearity of the atomic moments has been evidenced when the Dy anisotropy constant value grows. We have also shown the existence of inhomogeneous magnetisation profiles along the samples which are related to the concentration profiles.
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Dates et versions

hal-00294211 , version 1 (08-07-2008)

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Etienne Talbot, Pierre-Emmanuel Berche, Denis Ledue. Monte Carlo investigation of the magnetic anisotropy in Fe/Dy multilayers. Journal of Magnetism and Magnetic Materials, 2008, 320 (21), pp.2814. ⟨10.1016/j.jmmm.2008.06.032⟩. ⟨hal-00294211⟩
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