High-speed domain wall racetracks in a magnetic insulator.

ABSTRACT: Recent reports of current-induced switching of ferrimagnetic oxides coupled to heavy metals have opened prospects for implementing magnetic insulators into electrically addressable devices. However, the configuration and dynamics of magnetic domain walls driven by electrical currents in insulating oxides remain unexplored. Here we investigate the internal structure of the domain walls in Tm₃Fe₅O₁₂ (TmIG) and TmIG/Pt bilayers, and demonstrate their efficient manipulation by spin-orbit torques with velocities of up to 400 ms^-1 and minimal current threshold for domain wall flow of 5 × 10⁶ A cm^-2. Domain wall racetracks are defined by Pt current lines on continuous TmIG films, which allows for patterning the magnetic landscape o

SUBMITTER: Velez S 

PROVIDER: S-EPMC6802104 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature