Details

Autor(en) / Beteiligte

• Sánchez-Tejerina, L.
• Alejos, O.
• Martínez, E.

Titel

Steady-state configurations of Dzyaloshinskii domain walls driven by field and current

Ist Teil von

• Journal of magnetism and magnetic materials, 2017-02, Vol.423, p.405-410

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The dynamics of Dzyaloshinskii domain walls (DDW) in ultrathin ferromagnetic strips with perpendicular magnetic anisotropy, for different values of both perpendicular field and longitudinal current excitation associated to the Spin-Hall effect, has been studied, taking into account different values of the interfacial Dzyaloshinskii-Moriya interaction (DMI). This study has been carried out with the help of the q-Φ one-dimensional model and micromagnetic simulations. We have found that Walker breakdown may be avoided by applying a certain threshold current, even though the inverse effect is also possible. We have also found that, for particular values of field and current, the magnetization within the DDW experiences an abrupt change of orientation, which provokes a change on the contribution of current to the terminal DDW velocity. This effect disappears for sufficiently strong DMI, as it is expected from the model. •Steady-state configurations of Dzyaloshinskii domain walls driven by field and current have been reported.•Field-like torques and Slonczewskii-like torques due to spin-orbit interactions have been considered.•The response is associated with the rotation of the domain wall inner magnetization.•An asymmetric behavior arising from the existence of degenerate states is shown.•The asymmetry results in different travelled distances and/or terminal speeds.