Curvature induced domain wall pinning

Abstract

It is shown that a local bend of a nanowire is a source of pinning potential for a transversal head-to-head (tail-to-tail) domain wall. Eigenfrequency of the domain wall free oscillations at the pinning potential and the effective friction are determined as functions of the curvature and domain wall width. The pinning potential originates from the effective curvature induced Dzyaloshinsky-like term in the exchange energy. The theoretical results are verified by means of micromagnetic simulations for the case of parabolic shape of the wire bend.

7 pages, 3 figures

References in corpus (4)

• Curvature effects in statics and dynamics of low dimensional magnets
• High domain wall velocities due to spin currents perpendicular to the plane
• Torsion induced effects in magnetic nanowires
• Effect of nonadiabatic spin transfer torque on domain wall resonance frequency and mass

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