Voltage-gated modulation of domain wall creep dynamics in an ultrathin metallic ferromagnet

TitleVoltage-gated modulation of domain wall creep dynamics in an ultrathin metallic ferromagnet
Publication TypeJournal Article
Year of Publication2012
AuthorsBauer, U, Emori, S, Beach, GSD
JournalApplied Physics Letters
Volume101
Issue17
Pagination172403
Date Published2012/10/22/
Abstract

The influence of gate voltage, temperature, and magnetic field on domain wall (DW) creep dynamics is investigated in Pt/Co/gadolinium oxide (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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4764071]