265 citations · 3.7k across the 158 of their papers we have counts for
18 papers · 1 filter
Update statistics in conservative parallel discrete event simulations of asynchronous systems
A. Kolakowska, M. A. Novotny, Per Arne Rikvold
We model the performance of an ideal closed chain of L processing elements that work in parallel in an asynchronous manner. Their state updates follow a generic conservative algori…
Effects of D-strain, g-strain, and dipolar interactions on EPR linewidths of the molecular magnets Fe8 and Mn12
Kyungwha Park, M. A. Novotny, N. S. Dalal +2
Electron paramagnetic resonance (EPR) measurements on single crystals of the molecular magnets Fe and Mn reveal complex nonlinearities in the linewidths as functions of…
Monte Carlo simulation of magnetization reversal via domain-wall motion in Fe sesquilayers on W(110)
M. Kolesik, M. A. Novotny, Per Arne Rikvold
Iron sesquilayers are ultrathin films with coverages between one and two atomic monolayers. They consist of an almost defect-free monolayer with compact islands of a second atomic…
A projection method for statics and dynamics of lattice spin systems
M. Kolesik, M. A. Novotny, P. A. Rikvold
A method based on Monte Carlo sampling of the probability flows projected onto the subspace of one or more slow variables is proposed for investigation of dynamic and static proper…
Monte Carlo Simulation of Magnetization Reversal in Fe Sesquilayers on W(110)
M. Kolesik, M. A. Novotny, P. A. Rikvold
Iron sesquilayers grown at room temperature on W(110) exhibit a pronounced coercivity maximum near a coverage of 1.5 atomic monolayers. On lattices which faithfully reproduce the m…
Equilibrium and nonequilibrium applications of lattice-gas models in electrochemistry
Per Arne Rikvold, Gregory Brown, M. A. Novotny +1
We discuss applications of statistical-mechanical lattice-gas models to study static and dynamic aspects of electrochemical adsorption. The strategy developed to describe specific…
Projected dynamics for metastable decay in Ising models
M. Kolesik, M. A. Novotny, P. A. Rikvold +1
The magnetization switching dynamics in the kinetic Ising model is projected onto a one-dimensional absorbing Markov chain. The resulting projected dynamics reproduces the direct s…
Magnetization switching in nanoscale ferromagnetic grains: simulations with heterogeneous nucleation
M. Kolesik, H. L. Richards, M. A. Novotny +2
We present results obtained with various types of heterogeneous nucleation in a kinetic Ising model of magnetization switching in single-domain ferromagnetic nanoparticles. We inve…
Numerical simulations of scattering speckle from phase ordering systems
Gregory Brown, Per Arne Rikvold, Martin Grant
The scattering of coherent X-rays from dynamically evolving systems is currently becoming experimentally feasible. The scattered beam produces a pattern of bright and dark speckles…
Underpotential deposition of Cu on Au(111) in sulfate-containing electrolytes: a theoretical and experimental study
Jun Zhang, Yung-Eun Sung, P. A. Rikvold +1
We study the underpotential deposition of Cu on single-crystal Au(111) electrodes in sulfate-containing electrolytes by a combination of computational statistical-mechanics based l…
Kinetic Ising Systems as Models of Magnetization Switching in Submicron Ferromagnets
Howard L. Richards, Scott W. Sides, Mark A. Novotny +1
Recently experimental techniques, such as magnetic force microscopy (MFM), have enabled the magnetic state of individual sub-micron particles to be resolved. Motivated by these exp…
Lattice-Gas Models of Adsorption in the Double Layer
P. A. Rikvold, J. Zhang, Y. -E. Sung +1
The theory of statistical-mechanical lattice-gas modeling of adsorption is reviewed and shown to be applicable to a range of electrochemical problems dominated by effective, latera…
Magnetization switching in nanoscale ferromagnetic grains: description by a kinetic Ising model
Howard L. Richards, Scott W. Sides, M. A. Novotny +1
The magnetic relaxation of ferromagnetic powders has been studied for many years, largely due to its importance to recording technologies. However, only recently have experiments b…
Computational Lattice-Gas Modeling of the Electrosorption of Small Molecules and Ions
P. A. Rikvold, M. Gamboa-Aldeco, J. Zhang +4
We present two recent applications of lattice-gas modeling techniques to electrochemical adsorption on catalytically active metal substrates: urea on Pt(100) and (bi)sulfate on Rh(…
Application of a constrained-transfer-matrix method to metastability in the Ising ferromagnet
C. C. A. Günther, P. A. Rikvold, M. A. Novotny
Applying a numerical transfer-matrix formalism, we obtain complex-valued constrained free energies for the two-dimensional square-lattice nearest-neighbor Ising ferromagnet below i…
Finite-range-scaling analysis of metastability in an Ising model with long-range interactions
Bryan M. Gorman, Per Arne Rikvold, M. A. Novotny
We apply both a scalar field theory and a recently developed transfer-matrix method to study the stationary properties of metastability in a two-state model with weak, long-range i…
Metastable lifetimes in a kinetic Ising model: Dependence on field and system size
Per Arne Rikvold, H. Tomita, S. Miyashita +1
The lifetimes of metastable states in kinetic Ising ferromagnets are studied by droplet theory and Monte Carlo simulation, in order to determine their dependences on applied field…
A Numerical Transfer-Matrix Study of Surface-Tension Anisotropy in Ising Models on Square and Cubic Lattices
Howard L. Richards, M. A. Novotny, Per Arne Rikvold
We compute by numerical transfer-matrix methods the surface free energy the surface stiffness coefficient and the single-step free energy for Ising ferromagn…