Refraction of Spin Waves by Bifocal Surface Ferromagnetic Lens in External Magnetic Field Directed Along the Hard Axis

Abstract

Behavior of spin wave propagation in ferromagnetic medium with non-uniform distribution of magnetic parameters is studied. In particular, the influence of external magnetic field, spin-wave frequency and exchange parameter on the behavior of surface spin wave propagate through inhomogeneity made in the form of lens (lens is biaxial ferromagnet placed into uniaxial ferromagnetic medium. Ferromagnets are in the homogeneous magnetic field directed along the hard axis of biaxial ferromagnet) is studied.