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  • Title: Spin drift velocity, polarization, and current-driven domain-wall motion in (Ga,Mn)(As,P).
    Author: Curiale J, Lemaître A, Ulysse C, Faini G, Jeudy V.
    Journal: Phys Rev Lett; 2012 Feb 17; 108(7):076604. PubMed ID: 22401234.
    Abstract:
    Current-driven domain-wall motion is studied in (Ga,Mn)(As,P) ferromagnetic semiconducting tracks with perpendicular anisotropy. A linear steady state flow regime is observed over a large temperature range of the ferromagnetic phase (0.1T(c)<T<T(c)). Close to 0 K, the domain-wall velocity is found to coincide with the spin drift velocity. This result is obtained below the intrinsic threshold for domain-wall motion which implies a nonadiabatic contribution to the spin transfer torque. The current spin polarization is deduced close to 0 K and to T(c). It suggests that the temperature dependence of the spin polarization can be inferred from the domain-wall dynamics.
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