174 citations · 1.4k across the 70 of their papers we have counts for
17 papers · 1 filter
Monte Carlo Simulation of Small-World Models with Weak Long-Range Interactions
X. Zhang, M. A. Novotny
Large-scale Monte Carlo simulations, together with scaling, are used to obtain the critical behavior of the Hastings long-range model and two corresponding models based on small-wo…
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…
Magnetic Small World Nanomaterials: Physical Small World Networks
M. A. Novotny, X. Zhang, J. Yancey +5
The question addressed is whether magnetic materials based on physical small world networks are possible. Physical constraints, such as uniform bond length and embedding in three d…
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…
MCAMC: An Advanced Algorithm for Kinetic Monte Carlo Simulations: from Magnetization Switching to Protein Folding
M. A. Novotny, Shannon M. Wheeler
We present the Monte Carlo with Absorbing Markov Chains (MCAMC) method for extremely long kinetic Monte Carlo simulations. The MCAMC algorithm does not modify the system dynamics.…
Dynamics of Magnetization Reversal in Models of Magnetic Nanoparticles and Ultrathin Films
Per Arne Rikvold, Gregory Brown, Steven J. Mitchell +1
We discuss numerical and theoretical results for models of magnetization switching in nanoparticles and ultrathin films. The models and computational methods include kinetic Ising…
Langevin Simulation of Thermally Activated Magnetization Reversal in Nanoscale Pillars
Gregory Brown, M. A. Novotny, Per Arne Rikvold
Numerical solutions of the Landau-Lifshitz-Gilbert micromagnetic model incorporating thermal fluctuations and dipole-dipole interactions (calculated by the Fast Multipole Method) a…
Fine-grid Simulations of Thermally Activated Switching in Nanoscale Magets
G. Brown, M. A. Novotny, P. A. Rikvold
Numerical integration of the Landau-Lifshitz-Gilbert equation with thermal fluctuations is used to study the dynamic response of single-domain nanomagnets to rapid changes in the a…
Introduction to the Propp-Wilson Method of Exact Sampling for the Ising Model
Mark A. Novotny
An introduction to the Propp-Wilson method of coupling-from-the-past for the Ising model is presented. It enables one to obtain exact samples from the equilibrium spin distribution…
Simulation of Magnetization Switching in Biaxial Single-Domain Ferromagnetic Particles
Xuekun Kou, M. A. Novotny, Per Arne Rikvold
The magnetization switching dynamics of biaxial single-domain homogeneous ferromagnetic particles, in which the two easy axes are perpendicular to each other, is simulated using a…
Test of the Kolmogorov-Johnson-Mehl-Avrami picture of metastable decay in a model with microscopic dynamics
Raphael A. Ramos, Per Arne Rikvold, M. A. Novotny
The Kolmogorov-Johnson-Mehl-Avrami (KJMA) theory for the time evolution of the order parameter in systems undergoing first-order phase transformations has been extended by Sekimoto…
Computer Simulations of Thermal Switching in Small-grain Ferromagnets
M. A. Novotny, G. Brown, P. A. Rikvold
We present Monte Carlo and Langevin micromagnetic calculations to investigate thermal switching of single-domain ferromagnetic particles. For the Monte Carlo study we place particu…
Magnetic Particles
M. A. Novotny, P. A. Rikvold
We present an overview of the subject of Magnetic Particles, starting at a level suitable for advanced high-school students and ending at a level suitable for current practitioners…
Compensation Temperature of a Mixed Ising Ferrimagnetic Model in the Presence of External Magnetic Fields
G. M. Buendia, E. Machado, M. A. Novotny
The behavior of the compensation temperature of a mixed Ising ferrimagnetic system on a square lattice in which the two interpenetrating square sublattices have spins ($\pm 1/2…
Hard Simulation Problems in the Modeling of Magnetic Materials: Parallelization and Langevin Micromagnetics
G. Korniss, G. Brown, M. A. Novotny +1
We present recent results on two attempts at understanding and utilizing large-scale simulations of magnetic materials. In the first study we consider massively parallel implementa…