6533b7d8fe1ef96bd126b75a
RESEARCH PRODUCT
Domain wall transformations and hopping in La0.7Sr0.3MnO3nanostructures imaged with high resolution x-ray magnetic microscopy
Mathias KläuiStefan EisebittStefan EisebittSergio ValenciaMohamad-assaad MawassMohamad-assaad MawassC. A. F. VazC. A. F. VazSimone FinizioLaurence MéchinAndré BisigAndré BisigAndré BisigBenjamin KrügerL PeñaFelix BüttnerFelix BüttnerMichael FoersterS. El MoussaouiS. HühnVasily MoshnyagaT. MiyawakiL. Le GuyaderFlorian Kronastsubject
Materials scienceNanostructure530 PhysicsNucleation01 natural sciencesCondensed Matter::Materials ScienceLanthanum0103 physical sciencesMicroscopyddc:530General Materials Science010306 general physicsSpin (physics)010302 applied physicsMicroscopyCondensed matter physicsMagnetic PhenomenaX-RaysElectric ConductivityTemperatureOxides530 PhysikCondensed Matter PhysicsNanostructuresVortexDomain wall (magnetism)Manganese CompoundsStrontiumCurie temperatureCondensed Matter::Strongly Correlated ElectronsJoule heatingdescription
We investigate the effect of electric current pulse injection on domain walls in La(0.7)Sr(0.3)MnO(3) (LSMO) half-ring nanostructures by high resolution x-ray magnetic microscopy at room temperature. Due to the easily accessible Curie temperature of LSMO, we can employ reasonable current densities to induce the Joule heating necessary to observe effects such as hopping of the domain walls between different pinning sites and nucleation/annihilation events. Such effects are the dominant features close to the Curie temperature, while spin torque is found to play a small role close to room temperature. We are also able to observe thermally activated domain wall transformations and we find that, for the analyzed geometries, the vortex domain wall configuration is energetically favored, in agreement with micromagnetic simulations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-01-01 | Journal of Physics: Condensed Matter |