Creep and Flow Regimes of Magnetic Domain-Wall Motion in Ultrathin Pt / Co / Pt Films with Perpendicular Anisotropy
Résumé
We report on magnetic domain-wall velocity measurements in ultrathin Pt=Co0:5-0:8 nm=Pt films with perpendicular anisotropy over a large range of applied magnetic fields. The complete velocity-field characteristics are obtained, enabling an examination of the transition between thermally activated creep and viscous flow: motion regimes predicted from general theories for driven elastic interfaces in weakly disordered media. The dissipation limited flow regime is found to be consistent with precessional domain-wall motion, analysis of which yields values for the damping parameter, .
Domaines
Matière Condensée [cond-mat]
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