A Micromagnetic Simulation Study On Spin-Wave And Skyrmion In Magnetic Nanotrack

This thesis conducts an study on spin-wave and skyrmion movement in magneticnanotrack,which consistsof the followingfour parts:The introduction describes the development process of micromagnetic and spin waves,and showssome related knowledgeof basicmagnetic interaction.The second chapter expounds the domain wall,Skyrmion and numerical calculation method — micromagnetic simulation.The third chapter studies the bend magnonic waveguide in spin waves by the method of micromagnetic simulation.we finds transmission behaviors that associate with frequency,and proposes physical mechanism to explain the behaviors.Besides,we finds that in some certain frequencies,curved waveguide acts as a "filter" to filter out some spin-wave pattern.At some frequency,when the spin-wave go through the bend,asymmetric spin-wave interference schema appears in the waveguide,which is caused by the interacted interference of anti-symmetric sub-wave and the original symmetry.Compared with another system,we findsthat the translational-symmetrybroken caused by geometry bending is the main reason for explaining the appearance of anti-symmetric,and the uneven distribution of static magnetization in bending position is not an essentialelement of excitatiom.The fourth chapter elaborates skyrmion movement driven by spin-wave in micro-nanomagnetic stripe.we observes dimension changes of skyrmion movement duringthe moving,which depends on the amplitude and frequency of spin-wave.