Classification of Magnetic Forces on Antiferromagnetic Domain Wall

Abstract

A major challenge in spintronics is to find an efficient means to manipulate antiferromagnet (AFM) states, which are inert relative to a uniform magnetic field, due to the vanishingly-small net magnetization. The question is, how does an AFM response to an inhomogeneous field? Here we address the problem through a complete classification of the magnetic forces on an AFM domain wall (DW), revealing the following physical properties: (i) the tiny net magnetization still responses to the field gradient. (ii) the Néel order is sensitive to the field difference between two sublattices. (iii) DW energy has a quadratic dependence on the magnetic field due to its noncollinear structure. Remarkably, the first two factors drive DW to the opposite directions in a nanowire, but the third effect tends to push the DW to the high field region. Consequently, the competition among these three forces can be applied to understand the seemingly-contradictory results on AFM motion in literature. Additionally, our results provide a new route for a speedy manipulating AFM DW; our numerical simulation indicated that for a synthetic antiferromagnet, the DW propagating speed can reach tens of kilometers per second, an order of magnitude higher than that driven by an electric current.

arXiv comment5 pages. 3 figures

References in corpus (25)

• Antiferromagnetic spintronics
• Electrical switching of an antiferromagnet
• Magnetization switching by spin-orbit torque in an antiferromagnet/ferromagnet bilayer system
• Room-temperature antiferromagnetic memory resistor
• Static and Dynamical Properties of Antiferromagnetic Skyrmions in the Presence of Applied Current and Temperature
• Relativistic Neel-order fields induced by electrical current in antiferromagnets
• Antiferromagnetic Skyrmion: Stability, Creation and Manipulation
• Spin pumping and spin-transfer torques in antiferromagnets
• Antiferromagnetic spin Seebeck Effect
• Staggering antiferromagnetic domain wall velocity in a staggered spin-orbit field
• Antiferromagnetic domain wall motion driven by spin-orbit torques
• Phenomenology of Current-Induced Dynamics in Antiferromagnets
• Superfluid spin transport through antiferromagnetic insulators
• Staggered Dynamics in Antiferromagnets by Collective Coordinates
• Antiferromagnetic Domain Wall Motion Induced by Spin Waves
• Spin-transfer torques in anti-ferromagnetic metals from first principles
• The Intrinsic Magnetization of Antiferromagnetic Textures
• Current-induced torques due to compensated antiferromagnets
• Angular and Linear Momentum of Excited Ferromagnets
• Inelastic scattering in ferromagnetic and antiferromagnetic metal spintronics
• Magnon-photon coupling in antiferromagnets
• Mode-Dependent Damping in Metallic Antiferromagnets Due to Inter-Sublattice Spin Pumping
• Influence of nonlocal damping on the field-driven domain wall motion
• Thermodynamic Entanglement of Magnonic Condensates
• Magnonic analog of relativistic Zitterbewegung in an antiferromagnetic spin chain

Cited by in corpus (12)

• Atomic antiferromagnetic domain wall propagation beyond the relativistic limit
• Recent progress in antiferromagnetic dynamics
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• Magnetic field control of antiferromagnetic domain walls in a thermal gradient
• Strong entanglement of spins inside a quantum domain wall
• Signal detection based on the chaotic motion of an antiferromagnetic domain wall
• Anomalies in the switching dynamics of C-type antiferromagnets and antiferromagnetic nanowires
• Inertial domain wall characterization in layered multisublattice antiferromagnets
• High-speed antiferromagnetic domain walls driven by coherent spin waves
• Magnetic-Field-Driven Antiferromagnetic Domain Wall Motion
• Chaotic spin precession in antiferromagnetic domain walls
• Fast reversal of Néel vectors in antiferromagnets via domain-wall motion driven by vertically injected spin currents