Absence of Walker breakdown in the dynamics of chiral Neel domain walls driven by in-plane strain gradients

Abstract

We investigate theoretically the motion of chiral Néel domain walls in perpendicularly magnetized systems driven by in-plane strain gradients. We show that such strain drives domain walls efficiently towards increasing tensile (compressive) strain for positive (negative) magnetostrictive materials. During their motion a local damping torque that opposes the precessional torque due to the strain gradient arises. This torque prevents the onset of turbulent dynamics, and steady domain wall motion with constant velocity is asymptotically reached for any arbitrary large strain gradient. Withal, velocities in the range of 500 m/s can be obtained using voltage-induced strain under realistic conditions.

References in corpus (19)

• The design and verification of Mumax3
• Current-driven dynamics of chiral ferromagnetic domain walls
• Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
• Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
• Domain wall mobility, stability and Walker breakdown in magnetic nanowires
• Antiferromagnetic domain wall motion driven by spin-orbit torques
• Current-induced domain wall motion in compensated ferrimagnet
• Modification of perpendicular magnetic anisotropy and domain wall velocity in Pt/Co/Pt by voltage-induced strain
• A thermodynamic theory for thermal-gradient-driven domain wall motion
• Domain-Wall Pinning by Local Control of Anisotropy in Pt/Co/Pt strips
• Geometry-induced motion of magnetic domain walls in curved nanostripes
• Domain Wall-Magnetic Tunnel Junction Spin Orbit Torque Devices and Circuits for In-Memory Computing
• Ultrafast domain wall motion in ferrimagnets induced by magnetic anisotropy gradient
• Switching between Magnetic Bloch and Néel Domain Walls with Anisotropy Modulations
• Analytical computation of the demagnetizing energy of thin film domain walls
• Ultralow-loss domain wall motion driven by magnetocrystalline anisotropy gradient in antiferromagnetic nanowire
• Magnetoresistive sensors based on the elasticity of domain walls
• Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy
• Domain Wall Motion in Magnetic Nanostrips