Spin texture motion in antiferromagnetic and ferromagnetic nanowires

Abstract

We propose a Hamiltonian dynamics formalism for the current and magnetic field driven dynamics of ferromagnetic and antiferromagnetic domain walls in one dimensional systems. To demonstrate the power of this formalism, we derive Hamilton equations of motion via Poisson brackets based on the Landau-Lifshitz-Gilbert phenomenology, and add dissipative dynamics via the evolution of the energy. We use this approach to study current induced domain wall motion and compute the drift velocity. For the antiferromagnetic case, we show that a nonzero magnetic moment is induced in the domain wall, which indicates that an additional application of a magnetic field would influence the antiferromagnetic domain-wall dynamics. We consider both cases of the magnetic field being parallel and transverse to the N{é}el field. Based on this formalism, we predict an orientation switch mechanism for antiferromagnetic domain walls which can be tested with the recently discovered N{é}el spin orbit torques.

7 pages, 3 figures

References in corpus (12)

• Spin pumping and spin-transfer torques in antiferromagnets
• Matching domain wall configuration and spin-orbit torques for very efficient domain-wall motion
• Dynamics of domain walls in magnetic nanostrips
• Phenomenology of Current-Induced Dynamics in Antiferromagnets
• Staggered Dynamics in Antiferromagnets by Collective Coordinates
• Spin transfer in an antiferromagnet
• Propulsion of a domain wall in an antiferromagnet by magnons
• Dynamics of a vortex domain wall in a magnetic nanostrip: an application of the collective coordinate approach
• Ultrafast Switching of Antiferromagnets via Spin-transfer Torque
• Microscopic theory of spin-orbit torques and skyrmion dynamics
• Minimization of Ohmic losses for domain wall motion in a ferromagnetic nanowire
• Anisotropic magnetoresistance in antiferromagnetic Sr2IrO4

Cited by in corpus (11)

• Theory of Topological Spin Hall Effect in Antiferromagnetic Skyrmion: Impact on Current-induced Motion
• Stability and lifetime of antiferromagnetic skyrmions
• Characterizing breathing dynamics of magnetic (anti-)skyrmions within the Hamiltonian formalism
• Skew scattering and side jump of spin wave across magnetic texture
• Effective description of domain wall strings
• Driving a magnetized domain wall in an antiferromagnet by magnons
• Nonlinear dynamics of topological ferromagnetic textures for frequency multiplication
• Quantum control of topological defects in magnetic systems
• Facilitating domain wall injection in magnetic nanowires by electrical means
• Controllable dispersion of domain wall movement in antiferromagnetic thin films at finite temperatures
• Fast reversal of Néel vectors in antiferromagnets via domain-wall motion driven by vertically injected spin currents