Inhomogeneous Gilbert damping from impurities and electron-electron interactions

Abstract

We present a unified theory of magnetic damping in itinerant electron ferromagnets at order $q^2$ including electron-electron interactions and disorder scattering. We show that the Gilbert damping coefficient can be expressed in terms of the spin conductivity, leading to a Matthiessen-type formula in which disorder and interaction contributions are additive. In a weak ferromagnet regime, electron-electron interactions lead to a strong enhancement of the Gilbert damping.

5 pages, 1 figure

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• Nonlocal magnetization dynamics in ferromagnetic heterostructures
• Theory of current-driven magnetization dynamics in inhomogeneous ferromagnets
• Large-amplitude coherent spin waves exited by spin-polarized current in nanoscale spin valves
• Spin dynamics from time-dependent spin density-functional theory
• Impurity relaxation mechanism for dynamic magnetization reversal in a single domain grain
• Transverse spin dynamics in a spin-polarized Fermi liquid
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Cited by in corpus (28)

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• Phenomenological description of the nonlocal magnetization relaxation in magnonics, spintronics, and domain-wall dynamics
• Spin polarized two-dimensional electron gas embedded in semimagnetic quantum well : ground state, spin responses, spin excitations, Raman spectrum
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• Relaxation of a classical spin coupled to a strongly correlated electron system
• Influence of nonlocal damping on the field-driven domain wall motion
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• Comparative study of methodologies to compute the intrinsic Gilbert damping: interrelations, validity and physical consequences
• Annihilation of topological solitons in magnetism with spin wave burst finale: The role of nonequilibrium electrons causing nonlocal damping and spin pumping over ultrabroadband frequency range
• Gilbert damping in metallic ferromagnets from Schwinger-Keldysh field theory: Intrinsically nonlocal and nonuniform, and made anisotropic by spin-orbit coupling
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• Phenomenological plasmon broadening and relation to the dispersion
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• Quantum noise in the spin transfer torque effect
• Spin transport through a nanojunction with a precessing anisotropic molecular spin: Quantum interference and spin-transfer torque
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