Calculation of demagnetisation curves of NdFeB-magnets using the finite-element-method

Author

Binner, Andreas ; Roth, Stefan ; Stiller, Cornelia

Volume

30

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

622

Lastpage

624

Abstract

A method is developed, which allows to investigate the influence of magnetostatic coupling of structural details on the demagnetization curve within a two dimensional model. In contrast to former methods, which assigned to each grain one value of magnetic field and one value of nucleation field only, this method takes into account the spatial distribution of these fields. It considers not only the coupling between adjacent grains but also the effect of distant grains. The nucleation fields along the boundary of the grains are generated by a statistical method. The magnetic field is calculated by FEM

Keywords

boron alloys; demagnetisation; ferromagnetic properties of substances; finite element analysis; grain boundaries; iron alloys; magnetostatics; neodymium alloys; statistical analysis; NdFeB; NdFeB-magnets; adjacent grains; demagnetisation curves; distant grains; finite-element-method; grain boundary; magnetic field; magnetostatic coupling; nucleation fields; spatial distribution; statistical method; structural details; two dimensional model; Couplings; Demagnetization; Finite element methods; Frequency; Magnetic anisotropy; Magnetic fields; Magnetostatics; Perpendicular magnetic anisotropy; Polarization; Switches;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312355

Filename

312355