Voltage-Gated Modulation of Domain Wall Velocity in an Ultrathin Metallic Ferromagnet

Abstract

The influence of gate voltage, temperature and magnetic field on domain wall (DW) creep dynamics is investigated in Pt/Co/GdOx films with perpendicular magnetic anisotropy and imaged by a scanning magneto-optical Kerr effect technique. The DW creep velocity can be controlled by an electric field applied to the Co/GdOx interface via a linear modulation of the activation energy barrier with gate voltage. At low speeds, the DW velocity can be changed significantly by a gate voltage, but the effect is diminished as the DW velocity increases, which limits electric field control of fast DW motion.

References in corpus (2)

• Electric-field control of magnetic domain wall motion and local magnetization reversal
• Electric field control of domain wall logic in piezoelec-tric/ferromagnetic nanodevices

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