Magnetostatic Maxwell equations and the Landau-Lifshitz-Gilbert (LLG) equation are combined to a multiscale method, which allows to extend the problem size of traditional micromagnetic simulations. By means of magnetostatic Maxwell equations macroscopic regions can be handled in an averaged and stationary sense, whereas the LLG allows to accurately describe domain formation as well as magnetization dynamics in some microscopic subregions. The two regions are coupled by means of their strayfield and the combined system is solved by an optimized time integration scheme.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3705809 | PMC |
| http://dx.doi.org/10.1016/j.jmmm.2013.04.085 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Galilean Bulk-Surface Electrothermodynamics and Applications to Electrochemistry.
Entropy (Basel)
February 2023
Weierstrass-Institute, Mohrenstr. 39, 10117 Berlin, Germany.
In this work, the balance equations of non-equilibrium thermodynamics are coupled to Galilean limit systems of the Maxwell equations, i.e., either to (i) the quasi-electrostatic limit or (ii) the quasi-magnetostatic limit.
View Article and Find Full Text PDFDeposition of Thick SiO Coatings to Carbonyl Iron Microparticles for Thermal Stability and Microwave Performance.
Sensors (Basel)
February 2023
Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia.
Thick dielectric SiO shells on the surface of iron particles enhance the thermal and electrodynamic parameters of the iron. A technique to deposit thick, 500-nm, SiO shell to the surface of carbonyl iron (CI) particles was developed. The method consists of repeated deposition of SiO particles with air drying between iterations.
View Article and Find Full Text PDFModeling transcranial magnetic stimulation coil with magnetic cores.
J Neural Eng
January 2023
Computational Neurostimulation Research Program, Noninvasive Neuromodulation Unit, Experimental Therapeutics & Pathophysiology Branch, National Institute of Mental Health Intramural Research Program, National Institutes of Health, Bethesda, MD, United States of America.
Accurate modeling of transcranial magnetic stimulation (TMS) coils with the magnetic core is largely an open problem since commercial (quasi) magnetostatic solvers do not output specific field characteristics (e.g. induced electric field) and have difficulties when incorporating realistic head models.
View Article and Find Full Text PDFA magnetically tunable metasurface comprising meta-atoms with InSb-patched, InAs-patched, and unpatched pixels was simulated using commercial software to maximize the absorption of normally incident radiation in the terahertz spectral regime, with the patches decorating the illuminated face of a gold-backed polyimide substrate. Maximum absorptance of 0.99 and minimum absorptance of 0.
View Article and Find Full Text PDFExtraction of winding parameters for 33/11 kV, 30 MVA transformer based on finite element method for frequency response modelling.
PLoS One
September 2020
TNB Research Sdn. Bhd., Kawasan Institut Penyelidikan, Kajang, Selangor, Malaysia.
This paper proposes an alternative approach to extract transformer's winding parameters of resistance (R), inductance (L), capacitance (C) and conductance (G) based on Finite Element Method (FEM). The capacitance and conductance were computed based on Fast Multiple Method (FMM) and Method of Moment (MoM) through quasi-electrostatics approach. The AC resistances and inductances were computed based on MoM through quasi-magnetostatics approach.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!