Title :
Semi-implicit steepest descent method for energy minimization and its application to micromagnetic simulation of permanent magnets
Author :
Furuya, A. ; Fujisaki, K. ; Shimizu, K. ; Uehara, Y. ; Ataka, T. ; Tanaka, T. ; Oshima, H.
Author_Institution :
Fujitsu Ltd., Kawasaki, Japan
Abstract :
To reveal the relationship between coercivity of permanent magnets and their microstructure, micromagnetics is one of the key technologies for analyzing the magnetization reversal mechanism. Especially, microscopic reversal process such as nucleation of a reversed domain and domain wall pinning has been investigated by micromagnetic simulation [1]. However, since the mesh size in the simulation should be less than the exchange length of a magnet to calculate the domain wall structure accurately, the overall dimensions of models for such simulation is practically limited to very small length scales. Therefore, further improvement in calculation speed are demanded to simulate reversal process of more realistic microstructure.
Keywords :
coercive force; crystal microstructure; gradient methods; magnetic domain walls; magnetisation reversal; micromagnetics; minimisation; permanent magnets; coercivity; domain wall pinning; domain wall structure; energy minimization; exchange length; magnetization reversal mechanism; mesh size; micromagnetic simulation; microscopic reversal process; microstructure; nucleation; permanent magnets; semiimplicit steepest descent method; small length scales; Magnetic domains; Magnetization; Magnetization reversal; Mathematical model; Micromagnetics; Microstructure; Numerical models;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7156536
