Figure 2. Action of the different spin-torques on the magnetic domain wall.

(a) Illustration of the domain wall and its coordinates in a track. The domain wall position is defined by x, ϕ is its internal tilt angle. (b) Schematic representation of the energy landscape for a domain wall depinned by the Field-like-torque (left) and the Slonczewski torque (right). H_c is the depinning field intrinsic to the pinning center, and H_K is the domain wall anisotropy field. (c) Resistive changes during current driven domain wall depinning from a given pinning center (resistance value of 38 Ω) for different values of the external magnetic field in the range [78–92] Oe. (d) Resistive changes during field (parallel to the z-axis) driven domain wall depinning from the same pinning center. The measurement has been done twice.