Magnetic Studies of Spin Wave in Fe/Ag Multilayer Films
- 77 Downloads
Magnetic properties of Fe/Ag multilayer films are investigated and examined versus Fe layer thickness t Fe. As a result, spontaneous magnetization M(T) temperature dependence has been revealed to be well described by a T 3/2 law in all multilayer films (7 Å≤t Fe≤60 Å). Spin-wave theory based on anisotropic ferromagnetic system has been also used to explain magnetization temperature dependence. For Fe layer thickness, approximate values for J 0 bulk exchange interaction and J s 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−x Fe x and bcc Fe1−x Ag x 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.
KeywordsFe/Ag multilayers Spin wave excitations Exchange interaction Magnetic moment DFT KKR–CPA method
Unable to display preview. Download preview PDF.
- 6.Ebert, H.: Electronic structure and physical properties of solids. In: Dreysse, H. (ed.) Lecture Notes in Physics, vol. 535, p. 191. Springer, Berlin (2009) Google Scholar
- 7.Ebert, H., et al.: The Munich SPR-KKR package, version 5.4, http://olymp.cup.uni-muenchen.de/ak/ebert/SPRKKR
- 16.Jiles, D.: Introduction to Magnetism and Magnetic Materials, Ames, Iowa, USA, p. 134 (1991) Google Scholar