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Magnon Contribution to the Magnetic Properties of a Multilayered System Made of 3d Transition Metal Binary Alloys A1-xBx

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Abstract

A multilayered system A1-xBx/NM, consisting of a layer of 3d transition metal binary alloy A1-xBx alternated with non-magnetic layer NM, is studied in the framework of the linear spin waves theory. The expression of the corresponding spin Hamiltonian is obtained and treated using the method of Green’s functions. The dependence of the excitation spectrum on composition and geometry of the studied samples has been underlined. The existence of a gap for creating magnetic elementary excitations (magnon) has been highlighted. This has allowed us to study the dynamics of these populations of magnons through the evolution of the gap and the lifetime of their state of creation as a function of the composition x. A comparison between the magnetization per spin calculated and measured led to a good agreement. This allowed us to deduce values of the exchange integrals that are in line with what is usually given for this type of super-lattices. A study of the combined effect of surface anisotropy and dipolar interaction is also reported at the end.

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Authors and Affiliations

  1. LPMC, Department of Physics, Faculty of Science, University Ibn Tofail, 133, 14000, Kenitra, BP, Morocco

    M. E. Bentayebi, A. Qachaou & A. Fahmi

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  1. M. E. Bentayebi
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  2. A. Qachaou
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  3. A. Fahmi
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Correspondence to M. E. Bentayebi.

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Bentayebi, M.E., Qachaou, A. & Fahmi, A. Magnon Contribution to the Magnetic Properties of a Multilayered System Made of 3d Transition Metal Binary Alloys A1-xBx. J Supercond Nov Magn 34, 2431–2440 (2021). https://doi.org/10.1007/s10948-021-05881-3

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