Physical Review Letters · 2006 · 239 citations · 27 references
Natural SciencesMaterials ScienceElectromagnetismMagnetic MaterialsSemiconductor MaterialsDomain WallsFerromagnetic MaterialsFerromagnetismMagnetic AnisotropyMagnetism In SolidsSpintronicsCurrent-driven Domain Wall MotionDomain Wall CreepDomain Wall DynamicsDomain Wall MotionFerromagnetic SemiconductorsMagneto-optic Kerr EffectMagneto-optical Kerr EffectPerpendicular Magnetic Anisotropy
Current-induced domain-wall motion with velocity spanning over 5 orders of magnitude up to 22 m/s has been observed by the magneto-optical Kerr effect in (Ga,Mn)As with perpendicular magnetic anisotropy. The data are employed to verify theories of spin transfer by the Slonczewski-like mechanism as well as by the torque resulting from spin-flip transitions in the domain-wall region. Evidence for domain-wall creep at low currents is found.
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