Magnetization Process Simulation of Nd-Fe-B Magnets Taking the Demagnetization Phenomenon Into Account

Author

Nakahata, Yasushi ; Todaka, Takashi ; Enokizono, Masato

Author_Institution

Dept. of Electr. & Electron. Eng., Oita Univ., Oita, Japan

Volume

47

Issue

5

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

1102

Lastpage

1105

Abstract

This paper presents results obtained from a numerical simulation of the magnetization distribution of Nd-Fe-B magnets. We used the three-dimensional Variable Magnetization and the Stoner-Wohlfarth (VMSW) method in the initial magnetization process. In the residual-magnetization and demagnetization processes, we used the magnetization equation of motion, which can be described by the Landau-Lifshitz-Gilbert (LLG) equation. The calculation results were compared to the measured results to verify the accuracy of numerical simulation.

Keywords

Landau levels; boron alloys; coercive force; demagnetisation; ferromagnetic materials; iron alloys; neodymium alloys; numerical analysis; permanent magnets; Landau-Lifshitz-Gilbert equation; NdFeB; Stoner-Wohlfarth method; coercive force; demagnetization phenomenon; magnetization distribution; magnetization equation-of-motion; magnetization process simulation; magnets; numerical simulation; residual magnetization; three-dimensional variable magnetization; Demagnetization; Magnetization; Magnetoacoustic effects; Magnetomechanical effects; Mathematical model; Perpendicular magnetic anisotropy; Demagnetization phenomenon; Landau–Lifshitz–Gilbert (LLG) equation; Nd-Fe-B magnet; Variable Magnetization and Stoner–Wohlfarth (VMSW) method; magnetization process simulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2072985

Filename

5754764