Micromagnetics simulation of ferromagnetic materials using large cells

Issue title: 14t⁢h International Workshop on 1&2 Dimensional Magnetic Measurement and Testing (2016)

Guest editors: Zhiguang Cheng, Jianguo Zhu, Yongjian Li and Johannes Sievert

Article type: Research Article

Authors: Gao, Yanhui^{a; *} | Eguchi, Yuto^a | Ebrahimi, Hassan^a | Dozono, Hiroshi^a | Muramatsu, Kazuhiro^a | Guan, Weimin^b | Yuan, Jiaxin^b | Tian, Cuihua^b | Chen, Baichao^b

Affiliations: [a] Department of Electrical and Electronic Engineering, Saga University, Saga 840-8502, Japan | [b] School of Electrical Engineering, Wuhan University, Wuhan 430072, Hubei, China

Correspondence: [*] Corresponding author: Yanhui Gao, Department of Electrical and Electronic Engineering, Saga University, 1 Honjo-machi, Saga-shi, Saga 840-8502, Japan. Tel.: +81 952 28 8791; Fax: +81 952 28 8651; E-mail: [email protected].

Abstract: In this paper, numerical techniques for simulation of magnetic domain structures of ferromagnetic materials using micromagnetics with large cells are investigated to save the computation cost. The exchange energy is modified to be applicable to large cells considering the angle between two neighboring cells. The demagnetizing energy is also modified to take account of erroneous magnetic surface charges which appear around the domain walls as a result of discretization. The method is then applied to a simple model and the result shows that an ideal vortex magnetic domain structure and domain wall motion can be represented.

Keywords: Magnetic domain, micromagnetics, exchange energy, demagnetization energy

DOI: 10.3233/JAE-172253

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 55, no. S1, pp. 15-21, 2017