Torsion induced effects in magnetic nanowires

Abstract

Magnetic helix wire is one of the most simple magnetic systems which manifest properties of both curvature and torsion. There exist two equilibrium states in the helix wire with easy-tangential anisotropy: a quasi-tangential magnetization distribution in case of relatively small curvatures and torsions, and an onion state in opposite case. In the last case the magnetization is close to tangential one, deviations are caused by the torsion and curvature. Possible equilibrium magnetization states in the helix magnet with different anisotropy directions are studied theoretically. The torsion also essentially influences the spin-wave dynamics, acting as an effective magnetic field. Originated from the curvature induced effective Dzyaloshinskii interaction, this magnetic field leads to the coupling between the helix chirality and the magnetochirality, it breaks mirror symmetry in spin-wave spectrum. All analytical predictions on magnetization statics an dynamics are well confirmed by the direct spin lattice simulations.

RevTeX, 14 pages, 7 figures

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Cited by in corpus (20)

• Micromagnetic Theory of Curvilinear Ferromagnetic Shells
• Curvature induced domain wall pinning
• Electronic materials with nanoscale curved geometries
• Curvature and torsion effects in the spin-current driven domain wall motion
• Rashba Torque Driven Domain Wall Motion in Magnetic Helices
• Magnetization in narrow ribbons: curvature effects
• Vortex-antivortex pairs induced by curvature in toroidal nanomagnets
• Curvilinear one-dimensional antiferromagnets
• Non-reciprocity of spin waves in magnetic nanotubes with helical equilibrium magnetization
• Magnetization ground state and reversal modes of magnetic nanotori
• Curvature-driven homogeneous Dzyaloshinskii-Moriya interaction and emergent weak ferromagnetism in anisotropic antiferromagnetic spin chains
• Frequency linewidth and decay length of spin waves in curved magnetic membranes
• Localization of magnon modes in a curved magnetic nanowire
• Curvature induced magnonic crystal in nanowires
• Change in the magnetic configurations of tubular nanostructures by tuning dipolar interactions
• Room temperature realization of artificial chiral magnets with reprogrammable magnon nonreciprocity at zero field
• Manipulation by magnetic frustration in ferrotoroidal spin chains via curvature and torsion
• Electrical control of superconducting spin valves using ferromagnetic helices
• A Study of Curvature Theory for Different Symmetry Classes of Hamiltonian
• Curvilinear spin-wave dynamics beyond the thin-shell approximation: Magnetic nanotubes as a case study