Gilbert damping in noncollinear ferromagnets

Abstract

The precession and damping of a collinear magnetization displaced from its equilibrium are described by the Landau-Lifshitz-Gilbert equation. For a noncollinear magnetization, it is not known how the damping should be described. We use first-principles scattering theory to investigate the damping in one-dimensional transverse domain walls (DWs) of the important ferromagnetic alloy Ni${}_{80}$Fe${}_{20}$ and interpret the results in terms of phenomenological models. The damping is found to depend not only on the magnetization texture but also on the specific dynamic modes of Bloch and Néel DWs. Even in the highly disordered Ni${}_{80}$Fe${}_{20}$ alloy, the damping is found to be remarkably nonlocal.

Final version accepted by Physical Review Letters

References in corpus (9)

• Mode- and size-dependent Landau-Lifshitz damping in magnetic nanostructures: Evidence for non-local damping
• Transverse spin diffusion in ferromagnets
• Inhomogeneous Gilbert damping from impurities and electron-electron interactions
• Effects of non-adiabaticity on the voltage generated by a moving domain wall
• Current-induced noise and damping in non-uniform ferromagnets
• Intrinsic Coupling between Current and Domain Wall Motion in (Ga,Mn)As
• Theory of spin magnetohydrodynamics
• Spin-orbit-coupling induced domain-wall resistance in diffusive ferromagnets
• External Control of a Metal-Insulator Transition in GaMnAs Wires

Cited by in corpus (11)

• Intrinsic mechanism for anisotropic magnetoresistance and experimental confirmation in Co${}_x$Fe${}_{1-x}$ single-crystal films
• Direct Method for Calculating Temperature-Dependent Transport Properties
• Mode-Dependent Damping in Metallic Antiferromagnets Due to Inter-Sublattice Spin Pumping
• Non-local Gilbert damping tensor within the torque-torque correlation model
• Consistent microscopic analysis of spin pumping effects
• Topological spin dynamics in cubic FeGe near room temperature
• Chiral damping, chiral gyromagnetism and current-induced torques in textured one-dimensional Rashba ferromagnets
• Recent progress in antiferromagnetic dynamics
• Calculating the spin memory loss at Cu$|$metal interfaces from first principles
• Magnetic damping anisotropy in the two-dimensional van der Waals material Fe${}_3$GeTe${}_2$ from first principles
• Dzyaloshinskii-Moriya interaction induced extrinsic linewidth broadening of ferromagnetic resonance