25 citations · 87 across the 10 of their papers we have counts for
10 papers
On a simple derivation of the very low damping escape rate for classical spins by modifying the method of Kramers
Declan J. Byrne, William T. Coffey, Yuri P. Kalmykov +1
The original perturbative Kramers' method (starting from the phase space coordinates) (Kramers, 1940) of determining the energy-controlled-diffusion equation for Newtonian particle…
Comparison of coupled nonlinear oscillator models for the transient response of power generating stations connected to low inertia systems
Marios Zarifakis, Declan J. Byrne, William T. Coffey +3
Coupled nonlinear oscillators, e.g., Kuramoto models, are commonly used to analyze electrical power systems. The cage model from statistical mechanics has also been used to describ…
Active Damping of Power Oscillations Following Frequency Changes in Low Inertia Power Systems
Marios Zarifakis, William T. Coffey, Yuri P. Kalmykov +3
The absolute requirement to increase the amount of energy generation from renewable sources e.g. predominantly asynchronously connected wind turbines and photovoltaic installations…
Damping dependence of spin-torque effects in thermally assisted magnetization reversal
Y. P. Kalmykov, D. Byrne, W. T. Coffey +3
Thermal fluctuations of nanomagnets driven by spin-polarized currents are treated via the Landau-Lifshitz-Gilbert equation as generalized to include both the random thermal noise f…
Spin relaxation in phase space
Yu. P. Kalmykov, W. T. Coffey, S. V. Titov
We have treated numerous illustrative examples of spin relaxation problems using Wigner's phase-space formulation of quantum mechanics of particles and spins. The merit of the phas…
Nonlinear ac stationary response and dynamic magnetic hysteresis of quantum uniaxial superparamagnets
Yuri P. Kalmykov, Serguey V. Titov, William T. Coffey
The nonlinear ac stationary response of uniaxial paramagnets and superparamagnets - nanoscale solids or clasters with spin number S ~ 10^0 - 10^4 - in superimposed uniform ac and d…
Spin-transfer torque effects in the dynamic forced response of the magnetization of nanoscale ferromagnets in superimposed ac and dc bias fields in the presence of thermal agitation
D. J. Byrne, W. T. Coffey, Y. P. Kalmykov +2
Spin-transfer torque (STT) effects on the stationary forced response of nanoscale ferromagnets subject to thermal fluctuations and driven by an ac magnetic field of arbitrary stren…
Reversal time of the magnetization of magnetic nanoparticles at very low damping
William T. Coffey, Yuri P. Kalmykov, Serguey V. Titov
The magnetization reversal time of ferromagnetic nanoparticles is investigated in the very low damping regime. The energy-controlled diffusion equation rooted in a generalization o…
Spin-torque effects in thermally assisted magnetization reversal: Method of statistical moments
Y. P. Kalmykov, W. T. Coffey, S. V. Titov +2
Thermal fluctuations of nanomagnets driven by spin-polarized currents are treated via the Landau-Lifshitz-Gilbert equation generalized to include both the random thermal noise fiel…
Magnetization dynamics of two interacting spins in an external magnetic field
S. V. Titov, H. Kachkachi, Yu. P. Kalmykov +1
The longitudinal relaxation time of the magnetization of a system of two exchange coupled spins subjected to a strong magnetic field is calculated exactly by averaging the stochast…