Local demagnetizing tensor calculation for arbitrary non-ellipsoidal bodies

Author

Huang, Xiao Hua ; Pardavi-Horvath, M.

Author_Institution

Inst. for Magnetic Res., George Washington Univ., Washington, DC, USA

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

4180

Lastpage

4182

Abstract

The distribution of the magnetization in planar ferrite devices is nonuniform due to the non-uniformity of the demagnetizing field. A method for calculating the local demagnetizing tensor for arbitrary 3-dimensional shapes, using the Finite Difference Method (FDM), is developed. The sample is discretized into rectangular elements and the magnetostatic interaction between each pair of elements is computed. The local demagnetizing tensor is obtained as the superposition of all interactions at the given element. With proper boundary conditions the method can be applied to the computation of the local demagnetizing tensor for arbitrarily shaped bodies. The local demagnetizing tensor can be used to calculate the non-uniform distribution in the ferrite, and to optimize the shape and size of the ferrite in the CAD of microwave devices

Keywords

demagnetisation; ferrites; finite difference methods; finite difference method; local demagnetizing tensor; magnetostatic interaction; microwave device; nonellipsoidal body; nonuniform magnetization distribution; planar ferrite device; rectangular elements; three-dimensional shape; Boundary conditions; Demagnetization; Ferrite devices; Finite difference methods; Magnetization; Magnetostatics; Microwave devices; Quantum computing; Shape; Tensile stress;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.539330

Filename

539330