Walker-like Domain Wall breakdown in layered Antiferromagnets driven by staggered spin-orbit fields

Abstract

Within linear continuum theory, no magnetic texture can propagate faster than the maximum group velocity of its spin waves. Here we report a transient regime due to the appearance of additional antiferromagnetic textures that breaks the Lorentz translational invariance of the magnetic system by atomistic spin dynamics simulations. This dynamical regime is akin to domain wall Walker-breakdown in ferromagnets and involves the nucleation of an antiferromagnetic domain wall pair. Subsequently, one of the nucleated 180${}^{\circ }$ domain wall creates with the original domain wall a 360${}^{\circ }$ spin-rotation which remains static even under the action of the spin-orbit field. The other 180${}^{\circ }$ domain wall becomes accelerated to super-magnonic speeds. Under large spin-orbit fields, multiple domain wall generation and recombination is obtained which may explain the recently experimentally observed current pulse induce shattering of large domain structures into small fragmented domains and the subsequent slow recreation of large-scale domain formation prior current pulse.

References in corpus (10)

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Cited by in corpus (9)

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• Signal detection based on the chaotic motion of an antiferromagnetic domain wall
• Magnetism in AV3Sb5 (A = Cs, Rb, K): Complex Landscape of the Dynamical Magnetic Textures
• Temperature dependence of spin-model parameters in antiferromagnets
• Inertial domain wall characterization in layered multisublattice antiferromagnets
• Topological energy release from collision of relativistic antiferromagnetic solitons
• Antiferromagnetic nanoscale bit arrays of magnetoelectric Cr${}_2$O${}_3$ thin films
• Time-dependent Schwinger boson mean-field theory of supermagnonic propagation in 2D antiferromagnets