Domain theory model for magnetic thin films

Author

Smith, Neil

Author_Institution

Eastman Kodak Co., San Diego, CA, USA

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

2380

Lastpage

2382

Abstract

A domain-theoretic model for external-field-driven magnetization processes in thin-film microelements is described. The film is mathematically described by a dynamic grid of quadrilateral domains whose magnetization directions and vertex locations are variables with which to minimize the total free energy. The magnetostatic interaction between uniformly (in-plane) magnetized polygonal domains is essentially treated exactly. Predicted results for reversal mechanisms and field-induced metastable remanent domain configurations in Permalloy microelements are in good qualitative agreement with Bitter pattern observations

Keywords

Permalloy; magnetic domains; magnetic thin films; magnetisation reversal; magnetostatics; Bitter pattern observations; Permalloy microelements; domain-theoretic model; dynamic grid; external-field-driven magnetization processes; field-induced metastable remanent domain configurations; magnetic thin films; magnetization directions; magnetostatic interaction; polygonal domains; quadrilateral domains; reversal mechanisms; thin-film microelements; total free energy; vertex locations; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetic films; Magnetic separation; Magnetization; Magnetostatics; Perpendicular magnetic anisotropy; Soft magnetic materials; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92115

Filename

92115