Unidirectional tilt of domain walls in equilibrium in biaxial stripes with Dzyaloshinskii-Moriya interaction

Abstract

The orientation of a chiral magnetic domain wall in a racetrack determines its dynamical properties. In equilibrium, magnetic domain walls are expected to be oriented perpendicular to the stripe axis. We demonstrate the appearance of a unidirectional domain wall tilt in out-of-plane magnetized stripes with biaxial anisotropy and Dzyaloshinskii--Moriya interaction (DMI). The tilt is a result of the interplay between the in-plane easy-axis anisotropy and DMI. We show that the additional anisotropy and DMI prefer different domain wall structure: anisotropy links the magnetization azimuthal angle inside the domain wall with the anisotropy direction in contrast to DMI, which prefers the magnetization perpendicular to the domain wall plane. Their balance with the energy gain due to domain wall extension defines the equilibrium magnetization the domain wall tilting. We demonstrate that the Walker field and the corresponding Walker velocity of the domain wall can be enhanced in the system supporting tilted walls.

5 pages, 3 figures, supplementary materials

References in corpus (5)

• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• The nature of domain walls in ultrathin ferromagnets revealed by scanning nanomagnetometry
• Spin orbit torques and Dzyaloshinskii-Moriya interaction in dual-interfaced Co-Ni multilayers
• Theory of Dzyaloshinskii domain wall tilt in ferromagnetic nanostrips
• Asymmetric velocity and tilt angle of domain walls induced by spin-orbit torques

Cited by in corpus (3)

• Dynamics of domain walls in curved antiferromagnetic wires
• Chiral breakdown engineered by mesoscale Dzyaloshinskii-Moriya interaction in biaxial magnetic nanotubes
• Modulated phases in a spin model with Dzyaloshinskii-Moriya interactions