METHOD AND ASSEMBLY FOR EXCITING SPIN WAVES IN MAGNETIC SOLID BODIES

摘要

The invention relates to a method and assembly for spin wave excitement in ferro- or ferrimagnetic solid bodies, such as in a magnetic conductor path or in a magnetic nanowire. The invention is in particular applicable for signal and information transport on the basis of propagating spin waves in electrical switch circuits and components and in the field of the implementation of logical circuits. The aim of the invention is to provide a method for spin wave excitation by means of which spin wave types of the same type can be reproducibly excited in simply structured solid bodies without using electrical currents, magnetic fields and heat effects. Included in said aim is the creation of an advantageously usable assembly for carrying out the novel method. The method according to the invention is characterized in that a domain wall, spatially fixed in a magnetic solid body, is illuminated by polarized, pulsed laser light using the inverse magneto-optical gradient effect, wherein the illumination of the domain wall takes place in vertical incidence in the case of magnetized domains in the plane of the solid body and in angled incidence in the case of magnetized domains perpendicular to the solid body plane, especially avoiding heat input into the solid body.