Nutation in antiferromagnetic resonance

Abstract

The effect of inertial spin dynamics is compared between ferromagnetic, antiferromagnetic and ferrimagnetic systems. The linear response to an oscillating external magnetic field is calculated within the framework of the inertial Landau--Lifshitz--Gilbert equation using analytical theory and computer simulations. Precession and nutation resonance peaks are identified, and it is demonstrated that the precession frequencies are reduced by the spin inertia, while the lifetime of the excitations is enhanced. The interplay between precession and nutation is found to be the most prominent in antiferromagnets, where the timescale of the exchange-driven sublattice dynamics is comparable to inertial relaxation times. Consequently, antiferromagnetic resonance techniques should be better suited for the search for intrinsical inertial spin dynamics on ultrafast timescales than ferromagnetic resonance.

arXiv comment11 pages, 4 figures

References in corpus (12)

• Phenomenology of Current-Induced Dynamics in Antiferromagnets
• Magnetization dynamics in the inertial regime: nutation predicted at short time scales
• Atomistic spin dynamic method with both damping and moment of inertia effects included from first principles
• Magnetization Dynamics, Gyromagnetic Relation, and Inertial Effects
• Gilbert damping phenomenology for two-sublattice magnets
• Relativistic theory of magnetic inertia in ultrafast spin dynamics
• Spin Dynamics with Inertia in Metallic Ferromagnets
• Generalisation of Gilbert damping and magnetic inertia parameter as a series of higher-order relativistic terms
• Inertial terms to magnetization dynamics in ferromagnetic thin films
• Nutation Resonance in Ferromagnets
• Nutation Wave as a Platform for Ultrafast Spin Dynamics in Ferromagnets
• Reduced thermal stability of antiferromagnetic nanostructures

Cited by in corpus (19)

• Inertial spin dynamics in epitaxial cobalt films
• Anatomy of inertial magnons in ferromagnets
• Dispersion relation of nutation surface spin waves in ferromagnets
• Nutation spin waves in ferromagnets
• Inertial effects in ultrafast spin dynamics
• Inertial spin waves in ferromagnets and antiferromagnets
• Theory of inertial spin dynamics in anisotropic ferromagnets
• Spin pumping at terahertz nutation resonances
• Nutational switching in ferromagnets and antiferromagnets
• Influence of inter-sublattice coupling on the terahertz nutation spin dynamics in antiferromagnets
• Theory of magnetic inertial dynamics in two-sublattice ferromagnets
• Magnetic nutation: transient separation of magnetization from its angular momentum
• Fate of entanglement in magnetism under Lindbladian or non-Markovian dynamics and conditions for their transition to Landau-Lifshitz-Gilbert classical dynamics
• Inertial spin waves in spin spirals
• Theory of tensorial magnetic inertia in terahertz spin dynamics
• Engineering spin-wave spectrum via the magnetization inertia tensor
• Chirality and polarization of inertial antiferromagnetic resonances driven by spin-orbit torques
• Magnetization switching in the inertial regime
• Field-derivative torque induced magnetization reversal in ferrimagnetic Gd${}_{3/2}$Yb${}_{1/2}$BiFe${}_5$O${}_{12}$