265 citations · 3.7k across the 158 of their papers we have counts for
39 papers · 1 filter
Fluctuations in a model ferromagnetic film driven by a slowly oscillating field with a constant bias
Gloria M. Buendia, Per Arne Rikvold
We present a numerical and theoretical study that supports and explains recent experimental results on anomalous magnetization fluctuations of a uniaxial ferromagnetic film in its…
Phase diagrams and free-energy landscapes for model spin-crossover materials with antiferromagnetic-like nearest-neighbor and ferromagnetic-like long-range interactions
Chor-Hoi Chan, Gregory Brown, Per Arne Rikvold
We present phase diagrams, free-energy landscapes, and order-parameter distributions for a model spin-crossover material with a two-step transition between the high-spin and low-sp…
Equilibrium, Metastability, and Hysteresis in a Model Spin-crossover Material with Nearest-neighbor Antiferromagnetic-like and Long-range Ferromagnetic-like Interactions
P. A. Rikvold, G. Brown, S. Miyashita +2
Phase diagrams and hysteresis loops were obtained by Monte Carlo simulations and a mean-field method for a simplified model of a spin-crossover material with a two-step transition…
Kinetic Monte Carlo Simulations of a Model for Heat-assisted Magnetization Reversal in Ultrathin Films
W. R. Deskins, G. Brown, S. H. Thompson +1
To develop practically useful systems for ultra-high-density information recording with densities above terabits/cm, it is necessary to simultaneously achieve high thermal stab…
Resolution-dependent mechanisms for bimodal switching-time distributions in simulated Fe nanopillars
S. H. Thompson, G. Brown, A. Kuhnle +2
We study the magnetization-switching statistics following reversal of the applied field for three separate computational models representing the same physical system, an iron nanop…
Realization of the mean-field universality class in spin-crossover materials
Seiji Miyashita, Yusuké Konishi, Masamichi Nishino +2
In spin-crossover materials, the volume of a molecule changes depending on whether it is in the high-spin (HS) or low-spin (LS) state. This change causes distortion of the lattice.…
First-order Reversal Curve Analysis of Phase Transitions in Electrochemical Adsorption: A New Experimental Technique Suggested by Computer Simulations
I. Abou Hamad, D. T. Robb, P. A. Rikvold
The first-order reversal curve (FORC) method for analysis of systems undergoing hysteresis is applied to dynamical models of electrochemical adsorption. In this setting, the method…
New Cyclic Voltammetry Method for Examining Phase Transitions: Simulated Results
I. Abou Hamad, D. T. Robb, P. A. Rikvold
We propose a new experimental technique for cyclic voltammetry, based on the first-order reversal curve (FORC) method for analysis of systems undergoing hysteresis. The advantages…
Response of a Model of CO Oxidation with CO Desorption and Diffusion to a Periodic External CO Pressure
G. M. Buendia, E. Machado, P. A. Rikvold
We present a study of the dynamical behavior of a Ziff-Gulari-Barshad model with CO desorption and lateral diffusion. Depending on the values of the desorption and diffusion parame…
Kinetic Monte Carlo simulations of electrodeposition: Crossover from continuous to instantaneous homogeneous nucleation within Avrami's law
Stefan Frank, Per Arne Rikvold
The influence of lateral adsorbate diffusion on the dynamics of the first-order phase transition in a two-dimensional Ising lattice gas with attractive nearest-neighbor interaction…
Field-driven solid-on-solid interfaces moving under a stochastic Arrhenius dynamic: effects of the barrier height
G. M. Buendia, P. A. Rikvold, M. Kolesik
We present analytical results and kinetic Monte Carlo simulations for the mobility and microscopic structure of solid-on-solid (SOS) interfaces driven far from equilibrium by an ex…
Microstructure and velocity of field-driven solid-on-solid interfaces moving under stochastic dynamics with local energy barriers
G. M. Buendia, P. A. Rikvold, M. Kolesik
We study the microscopic structure and the stationary propagation velocity of (1+1)-dimensional solid-on-solid interfaces in an Ising lattice-gas model, which are driven far from e…
Decay of Metastable Nonequilibrium Phases, Enhanced Reaction Rate, and Dynamic Phase Transition in a Model of CO Oxidation with CO Desorption
E. Machado, G. M. Buendia, P. A. Rikvold +1
We present a computational study of the dynamic behavior of a Ziff-Gulari-Barshad model of CO oxidation with CO desorption on a catalytic surface. Our results provide further evide…
Cl electrosorption on Ag(100): Lateral interactions and electrosorption valency from comparison of Monte Carlo simulations with chronocoulometry experiments
I. Abou Hamad, S. J. Mitchell, Th. Wandlowski +2
We present Monte Carlo Simulations using an equilibrium lattice-gas model for the electrosorption of Cl on Ag(100) single-crystal surfaces. Fitting the simulated isotherms to chron…
Finite-temperature Simulations for Magnetic Nanostructures
M. A. Novotny, D. T. Robb, S. M. Stinnett +2
We examine different models and methods for studying finite-temperature magnetic hysteresis in nanoparticles and ultrathin films. This includes micromagnetic results for the hyster…
Effects of lateral diffusion on morphology and dynamics of a microscopic lattice-gas model of pulsed electrodeposition
Stefan Frank, Daniel E. Roberts, Per Arne Rikvold
The influence of nearest-neighbor diffusion on the decay of a metastable low-coverage phase (monolayer adsorption) in a square lattice-gas model of electrochemical metal deposition…
First-principles calculations for the adsorption of water molecules on the Cu(100) surface
Sanwu Wang, Yanzhao Cao, P. A. Rikvold
First-principles density-functional theory and supercell models are employed to calculate the adsorption of water molecules on the Cu(100) surface. In agreement with the experiment…
Determination of the basic timescale in kinetic Monte Carlo simulations by comparison with cyclic-voltammetry experiments
I. Abou Hamad, P. A. Rikvold, G. Brown
While kinetic Monte Carlo simulations can provide long-time simulations of the dynamics of physical and chemical systems, it is not yet possible in general to identify the inverse…
Angular Dependence of Switching Properties in Single Fe Nanopillars
G. Brown, S. M. Stinnett, M. A. Novotny +1
The continued increase in areal densities in magnetic recording makes it crucial to understand magnetization reversal in nanoparticles. We present finite-temperature micromagnetic…
Finite-Temperature Micromagnetics of Hysterisis for Misaligned Single Iron Nanopillars
M. A. Novotny, S. M. Stinnett, G. Brown +1
We present micromagnetic results for the hysterisis of a single magnetic nanopillar which is misaligned with respect to the applied magnetic field. We provide results for both a on…
Defects, Tunneling, and EPR Spectra of Single-Molecule Magnets
Kyungwha Park, M. A. Novotny, N. S. Dalal +5
We examine theoretically electron paramagnetic resonance (EPR) lineshapes as functions of resonance frequency, energy level, and temperature for single crystals of three different…
Electrosorption of Br and Cl on Ag(100): Experiments and Computer Simulations
I. Abou Hamad, Th. Wandlowski, G. Brown +1
We present chronocoulometry experiments and equilibrium Monte Carlo simulations for the electrosorption of Br and Cl on Ag(100) single-crystal electrode surfaces. Two different met…
Ab initio Monte Carlo simulations for finite-temperature properties: Application to lithium clusters and bulk liquid lithium
Sanwu Wang, Steven J. Mitchell, Per Arne Rikvold
Ab initio Monte Carlo simulations have been performed to determine the equilibrium properties of liquid lithium and lithium clusters at different temperatures. First-principles den…
Halide Adsorption on Single-crystal Silver Substrates: Dynamic Simulations and ab-initio Density-functional Theory
S. J. Mitchell, Sanwu Wang, P. A. Rikvold
We investigate the static and dynamic behaviors of a Br adlayer electrochemically deposited onto single-crystal Ag(100) using an off-lattice model of the adlayer. Unlike previous s…