Finite element modelling of giant magnetostriction in thin films

Author

Benbouzid, Mohamed El Hachemi ; Body, Christophe ; Reyne, Gilbert ; Meunier, Gérard

Author_Institution

Lab. des Syst. Autom., Picardie Univ., Amiens, France

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

3563

Lastpage

3565

Abstract

This paper describes a nonlinear model of giant magnetostriction in thin films by a finite element scheme for magnetostatic cases. Given a thin film structure, the magnetic field is first computed. Magnetic induction over elements is then used to compute the magnetoelastic energy. The minimization of the mechanical functional leads to the determination of displacement, strain, etc., due to the magnetostriction process. However, giant magnetostriction is characterized by a strong magneto-mechanical coupling. The model takes it into account by the use of the experimental data through the surface spline method and an iterative process of successive magnetic and mechanical computations

Keywords

electromagnetic induction; finite element analysis; iterative methods; magnetic fields; magnetic thin films; magnetoelastic effects; magnetostatic waves; magnetostriction; minimisation; splines (mathematics); finite element modelling; giant magnetostriction; iterative process; magnetic field; magnetic induction; magnetoelastic energy; magnetostatic cases; mechanical functional; minimization; nonlinear model; strong magneto-mechanical coupling; surface spline method; thin films; Couplings; Equations; Finite element methods; Magnetic field induced strain; Magnetic films; Magnetostatics; Magnetostriction; Spline; Stress; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.489570

Filename

489570