Rashba induced chirality switching of domain walls and suppression of the Walker breakdown

Abstract

In conventional domain wall systems the aim of a high domain wall velocity may be hindered by the occurrence of a Walker breakdown at comparably low current density. We show how a Rashba interaction can stabilize the domain wall dynamics and thereby shift the Walker breakdown to higher current densities. The Rashba interaction creates a field like spin torque, which breaks the symmetry of the system and modifies the internal structure of the domain wall. Besides a shift of the Walker breakdown it can additionally induce a chirality switch of the domain wall at sufficient Rashba fields. The preferred chirality may then be chosen by the direction of the current flow. Both, the suppression of the Walker breakdown and the chirality switching, affect the domain wall velocity. This is even more pronounced for short current pulses, where an additional domain wall movement after the pulse in either positive or negative direction can determine the final position of the domain wall.

10 pages, 9 figures

References in corpus (3)

• The Fascinating World of Landau-Lifshitz-Gilbert Equation: An Overview
• Current-induced domain wall motion in Rashba spin-orbit system
• Low-energy theory and RKKY interaction for interacting quantum wires with Rashba spin-orbit coupling

Cited by in corpus (7)

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• Spin Orbit Torque in two dimensional Antiferromagnetic Topological Insulators
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• Understanding current-driven dynamics of magnetic Néel walls in heavy metal/ferromagnetic metal/oxide trilayers
• Steering of the Skyrmion Hall Angle By Gate Voltage
• Nonlocal spin torques in Rashba quantum wires with steep magnetic textures
• Dragging of magnetic domain walls by interlayer exchange