Applied Physics Letters · 2008 · 223 citations · 15 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsElectromagnetismThin FilmsFerromagnetismMagnetic AnisotropyMagnetic DomainsMagnetic NanomaterialsMagnetic Thin FilmsNanowiresCurrent DensityCurrent-driven Domain Wall MotionDomain Wall CreepDomain Wall DynamicsKerr MicroscopyMicrometer-scale Displacement MeasurementPerpendicular Magnetic AnisotropyWide-field Microscopy
Current-induced domain wall (DW) displacements in an array of ultrathin Pt/Co/AlOx wires with perpendicular magnetic anisotropy have been directly observed by wide field Kerr microscopy. DWs in all wires in the array were driven simultaneously and their displacement on the micrometer scale was controlled by the current pulse amplitude and duration. At the lower current densities where DW displacements were observed (j≤1.5×1012 A/m2), the DW motion obeys a creep law. At higher current density (j=1.8×1012 A/m2), zero-field average DW velocities up to 130±10 m/s were recorded.
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Magnetic Domain-Wall Racetrack Memory
S. Parkin, Masamitsu Hayashi, Luc Thomas · Science · 2008 · 4.6K citations
Natural Sciences, Electrical Engineering, Materials Science +17