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We demonstrated that dipole-exchange spin waves traveling in geometricallyrestricted magnetic thin films satisfy the same laws of reflection andrefraction as light waves. Moreover, we found for the first time novel wavebehaviors of dipole-exchange spin waves such as total reflection and negativerefraction. The total reflection in laterally inhomogeneous thin films composedof two different magnetic materials is associated with the forbidden modes ofrefracted dipole-exchange spin waves. The negative refraction occurs at a 90degree domain-wall magnetic interface that is introduced by a cubic magneticanisotropy in the media, through the anisotropic dispersion of dipole-exchangespin waves.

Total Reflection and Negative Refraction of Dipole-Exchange Spin Waves at Magnetic Interfaces: Micromagnetic Modeling Study