Magnetic domain walls in ultrathin films [Elektronische Ressource] : contribution of the Dzyaloshinsky-Moriya interaction / vorgelegt von Marcus Heide

Magnetic domain wallsin ultrathin films:Contribution of theDzyaloshinsky-Moriya interactionVon der Fakult¨at fu¨r Mathematik, Informatik und Naturwissenschaftender Rheinisch-Westf¨alischen Technischen Hochschule Aachenzur Erlangung des akademischen Grades eines Doktors der Naturwissenschaftengenehmigte Dissertationvorgelegt vonDiplom-PhysikerMarcus Heideaus Du¨sseldorfBerichter: Universit¨atsprofessor Dr. Stefan Blu¨gelUniversit¨atsprofessor Dr. Peter H. DederichsTag der mu¨ndlichen Pru¨fung: 28. Feb. 2006DieseDissertationistaufdenInternetseitenderHochschulbibliothekonlineverfu¨gbar.This thesis was written at the instituteTheorie 1, Institut fu¨r Festk¨orperforschung (IFF), Forschungszentrum Ju¨lich.It is available online at the internet pages of the libary ofRWTH Aachen university.1AbstractIn this theoretical thesis the structure of magnetic domain walls is explained by an in-terplay of spin stiffness, anisotropy energy and Dzyaloshinsky-Moriya interaction. Thewall structures are discussed within a micromagnetic model and the corresponding modelparameters are obtained ab initio by electronic-structure calculations.The inclusion of the Dzyaloshinsky-Moriya interaction in these investigations is a newaspect. This interaction arises only in certain crystal symmetries, it is of particular im-portance in the studied ultrathin magnetic films deposited on non-magnetic surfaces.