6533b7d0fe1ef96bd125b9ab
RESEARCH PRODUCT
Correlation between spin structure oscillations and domain wall velocities
Tolek TyliszczakHermann StollAndré BisigBartel Van WaeyenbergeMatthias NoskeMohamad-assaad MawassMohamad-assaad MawassMartin StarkMartin StarkMartin StarkJan RhensiusJan RhensiusChristoforos MoutafisGisela SchützMarkus WeigandFelix BüttnerJ. HeidlerMathias KläuiStefan EisebittStefan Eisebittsubject
DYNAMICSMOTIONMagnetic domainNanowireGeneral Physics and Astronomy02 engineering and technologyNANOWIRESSpin structure01 natural sciencesArticleMAGNETIC-FIELDSGeneral Biochemistry Genetics and Molecular BiologyNuclear magnetic resonancePosition (vector)0103 physical sciencesddc:530010306 general physicsPhysicsMultidisciplinaryCondensed matter physicsDynamics (mechanics)General Chemistry021001 nanoscience & nanotechnologySTATEMagnetic fieldDomain wall (magnetism)Physics and AstronomyDomain (ring theory)0210 nano-technologydescription
Magnetic sensing and logic devices based on the motion of magnetic domain walls rely on the precise and deterministic control of the position and the velocity of individual magnetic domain walls in curved nanowires. Varying domain wall velocities have been predicted to result from intrinsic effects such as oscillating domain wall spin structure transformations and extrinsic pinning due to imperfections. Here we use direct dynamic imaging of the nanoscale spin structure that allows us for the first time to directly check these predictions. We find a new regime of oscillating domain wall motion even below the Walker breakdown correlated with periodic spin structure changes. We show that the extrinsic pinning from imperfections in the nanowire only affects slow domain walls and we identify the magnetostatic energy, which scales with the domain wall velocity, as the energy reservoir for the domain wall to overcome the local pinning potential landscape.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-01-01 |