Current-induced distortion of a magnetic domain wallX. Waintal and M. Viret
CEA, Service de physique de l'état condensé, Centre d'étude de Saclay F-91191 Gif-sur-Yvette cedex, France
(Received 28 May 2003; accepted in final form 21 November 2003)
We consider the spin torque induced by a current flowing ballistically through a magnetic domain wall. In addition to a global pressure in the direction of the electronic flow, the torque has an internal structure of comparable magnitude due to the precession of the electrons' spins at the "Larmor" frequency. As a result, the profile of the domain wall is expected to get distorted by the current and acquires a periodic sur-structure.
85.75.-d - Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields.
75.60.-d - Domain effects, magnetization curves, and hysteresis.
75.30.Ds - Spin waves.
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