Abstract
Magnetic properties of Fe/Ag multilayer films are investigated and examined versus Fe layer thickness tFe. As a result, spontaneous magnetization M(T) temperature dependence has been revealed to be well described by a T3/2 law in all multilayer films (7 A≤tFe≤60 A). Spin-wave theory based on anisotropic ferromagnetic system has been also used to explain magnetization temperature dependence. For Fe layer thickness, approximate values for J0 bulk exchange interaction and Js surface exchange interaction have been estimated. First principle calculations based on density functional theory (DFT) and Korringa–Kohn–Rostoker (KKR)—coherent potential approximation (CPA) method—combined with Local Spin Density Approximation (LSDA), are performed as well. Magnetic moment, in fcc Ag1−xFex and bcc Fe1−xAgx systems, versus x is presented and discussed in terms of Fe content on magnetic coupling. Reasonable agreement between experimental data and theoretical calculations is highlighted.
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