Behavior of Surface Spin Waves at Reflection from Uniaxial Multilayer Ferromagnet

Abstract

The purpose of this article is to review the reflective properties of multilayer ferromagnet for surface spin waves. It was calculated the reflection coefficient of surface spin waves from multilayer ferromagnet with uniaxial magnetic anisotropy in non-ideal boundary conditions at the interface between layers. The problem is solved in the exchange approximation. Graphics shows us the dependence of the reflection coefficient on the frequency, of the external magnetic field, the exchange interaction constant and uniaxial magnetic anisotropy. It was found the strong dependence of the reflectance of the surface spin waves from these parameters, and also on the value of exchange stiffness that is well observed in its small value. There are characteristic for multilayer structures as prohibited zones and zones of cross waves. Changing the values of the wave frequency, the value of an external constant homogeneous magnetic field, constant exchange interaction and uniaxial magnetic anisotropy, it is possible to achieve the desired values of the reflection coefficient.