ABSTRACT
In conventional ferromagnets such as iron, nickel, and cobalt a noncollinear magnetization texture will create an inhomogeneous internal magnetic field and, therefore, locally affect the magnon dispersion. This chapter gives a short introduction to magnon transport in ferromagnetic stripes with a width in the micrometer range. It explores the magnon dispersion and the impact of its anisotropy, in order to sensitize the reader to challenges that emerge when guiding or steering magnons in two-dimensional structures. The chapter introduces a method based on locally generated magnetic fields for steering magnons and even switching their propagation path. It also discusses active channeling of magnons in magnetic domain walls. Combining different classes of materials and making use of their richness in topological spin textures sheds new light on magnonics. Spin textures such as skyrmions are on the real nanoscale and nonvolatile but still can be manipulated by electric currents or magnetic fields.
