title: Domain wall transformations and hopping in La(0.7)Sr(0.3)MnO(3) nanostructures imaged with high resolution x-ray magnetic microscopy.
abstract: 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.
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität, Staudingerweg 7, 55128 Mainz, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Finizio
authors.forename: M
authors.initials: M
authors.lastname: Foerster
authors.forename: B
authors.initials: B
authors.lastname: Krüger
authors.forename: C A F
authors.initials: CA
authors.lastname: Vaz
authors.forename: T
authors.initials: T
authors.lastname: Miyawaki
authors.forename: M A
authors.initials: MA
authors.lastname: Mawass
authors.forename: L
authors.initials: L
authors.lastname: Peña
authors.forename: L
authors.initials: L
authors.lastname: Méchin
authors.forename: S
authors.initials: S
authors.lastname: Hühn
authors.forename: V
authors.initials: V
authors.lastname: Moshnyaga
authors.forename: F
authors.initials: F
authors.lastname: Büttner
authors.forename: A
authors.initials: A
authors.lastname: Bisig
authors.forename: L
authors.initials: L
authors.lastname: Le Guyader
authors.forename: S
authors.initials: S
authors.lastname: El Moussaoui
authors.forename: S
authors.initials: S
authors.lastname: Valencia
authors.forename: F
authors.initials: F
authors.lastname: Kronast
authors.forename: S
authors.initials: S
authors.lastname: Eisebitt
authors.forename: M
authors.initials: M
authors.lastname: Kläui
mesh_terms: D004553:Electric Conductivity; D007811:Lanthanum / Q000737:chemistry*; D060328:Magnetic Phenomena; D017895:Manganese Compounds / Q000737:chemistry*; D008853:Microscopy; D049329:Nanostructures / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*; D013696:Temperature; D014965:X-Rays
chemical_list: D017895:Manganese Compounds; D010087:Oxides; D007811:Lanthanum; D013324:Strontium