Transition state theory characterizes thin film macrospin dynamics driven by an oscillatory magnetic field: Inertial effects
arXiv:2208.03613 · doi:10.1016/j.cnsns.2022.106764
Abstract
Understanding the magnetization switching process in ferromagnetic thin films is essential for many technological applications. We investigate the effects of periodic driving via magnetic fields on a macrospin system under explicit consideration of inertial dynamics. This is usually achieved by extending the Landau-Lifshitz-Gilbert equation with a term including the second time derivative of the magnetization. The dynamics of the magnetization switching can then be characterized by its switching rate. We apply methods from transition state theory for driven systems to resolve the rate of magnetization switching in this general case. In doing so, we find that magnetization exhibits resonance-like behavior under certain driving conditions, and it can be affected strongly by the system's relaxation rate.
arXiv comment13 pages, 5 figures
References in corpus (26)
- Switching of magnetization by non-linear resonance studied in single nanoparticles
- Lagrangian Descriptors: A Method for Revealing Phase Space Structures of General Time Dependent Dynamical Systems
- Magnetization dynamics in the inertial regime: nutation predicted at short time scales
- Spin-torque switching: Fokker-Planck rate calculation
- The hidden geometry of ocean flows
- Micromagnetics and spintronics: Models and numerical methods
- Magnetization Dynamics, Gyromagnetic Relation, and Inertial Effects
- Spin Dynamics with Inertia in Metallic Ferromagnets
- Magnetization reversal in the anisotropy-dominated regime using time-dependent magnetic fields
- Homoclinic chaos in the dynamics of a general Bianchi IX model
- Inertial terms to magnetization dynamics in ferromagnetic thin films
- Magnetization reversal condition for a nanomagnet within a rotating magnetic field
- Optimal switching of a nanomagnet assisted by microwaves
- Transition state trajectory stability determines barrier crossing rates in chemical reactions induced by time-dependent oscillating fields
- Invariant Manifolds and Rate Constants in Driven Chemical Reactions
- Magnetization switching by current and microwaves
- Microwave-assisted switching of a nanomagnet: analytical determination of the optimal microwave field
- Binary contraction method for the construction of time-dependent dividing surfaces in driven chemical reactions
- On the stability of satellites at unstable libration points of sun-planet-moon systems
- Magnetization switching by microwaves synchronized in the vicinity of precession frequency
- Influence of external driving on decays in the geometry of the LiCN isomerization
- Phase-space resolved rates in driven multidimensional chemical reactions
- Controlling reaction dynamics in chemical model systems through external driving
- Dynamics and decay rates of a time-dependent two-saddle system
- Thermal decay rates of an activated complex in a driven model chemical reaction
- Transition state dynamics of a driven magnetic free layer