Current-driven dynamics of coupled domain walls in a synthetic antiferromagnet

Abstract

We develop the theory of magnetic domain wall motion in coupled double-layer systems where electrons can hop between the layers giving rise to an antiferromagnetic coupling. We demonstrate that the force from the interlayer coupling drives the walls and the effect of the extrinsic pinning is greatly reduced if the domain walls are initially separated. The threshold current density for metastable spin-aligned configurations is also much lower. We conclude that the interlayer coupling has a significant effect on domain wall mobility in double-layer systems.

arXiv comment9 pages, 9 figures

References in corpus (8)

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Cited by in corpus (13)

• Antiferromagnetic spintronics
• Staggering antiferromagnetic domain wall velocity in a staggered spin-orbit field
• Antiferromagnetic Domain Wall as Spin Wave Polarizer and Retarder
• Effective gauge field theory of spintronics
• Very low critical current density for motion of coupled domain walls in synthetic ferrimagnet nanowires
• Effective Field Model of Roughness in Magnetic Structures
• Universal Absence of Walker Breakdown and Linear Current-Velocity Relation via Spin-Orbit Torques in Coupled and Single Domain Wall Motion
• Switching of biaxial synthetic antiferromagnets: a micromagentic study
• Synthetic Antiferromagnetic Spintronics: Part of a collection of reviews on antiferromagnetic spintronics
• Terahertz Spin Transfer Torque Oscillator Based on a Synthetic Antiferromagnet
• Efficient stopping of current-driven domain wall using a local Rashba field
• Theory of electron transport and magnetization dynamics in metallic ferromagnets
• Dragging of magnetic domain walls by interlayer exchange