Modified current induced domain wall motion in GaMnAs nanowire
arXiv:1303.6174 · doi:10.1103/PhysRevB.88.224415
Abstract
We report on current induced domain wall propagation in a patterned GaMnAs microwire with perpendicular magnetization. An unexpected slowing down of the propagation velocity has been found when the moving domain wall extends over only half of the width of the wire. This slowing down is related to the elongation of a longitudinal wall along the axis of the wire. By using an energy balance argument, the expected theoretical dependence of the velocity change has been calculated and compared with the experimental results. According to this, the energy associated to the longitudinal domain wall should change when a current passes through the wire. These results provide possible evidence of transverse spin diffusion along a longitudinal domain wall.
References in corpus (7)
- Microscopic approach to current-driven domain wall dynamics
- Velocity of domain-wall motion induced by electrical current in a ferromagnetic semiconductor (Ga,Mn)As
- High domain wall velocities induced by current in ultrathin Pt/Co/AlOx wires with perpendicular magnetic anisotropy
- Joule heating in nanowires
- Magnetic properties and domain structure of (Ga,Mn)As films with perpendicular anisotropy
- Field-Driven Domain-Wall Dynamics in GaMnAs Films with Perpendicular Anisotropy
- Determination of the micromagnetic parameters in (Ga,Mn)As using domain theory