Magnetic properties of lateral "antidot" arrays

Author

Jalil, M.B.A. ; Phoa, S.L.A. ; Tan, S.L. ; Adeyeye, A.O.

Author_Institution

Inf. Storage Mater. Lab., Nat. Univ. of Singapore, Singapore

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2556

Lastpage

2558

Abstract

Micromagnetic and transport modeling are performed with a ferromagnetic film with an etched array of square holes ("antidots"). In the submicron-size range, the presence of antidots significantly increases the coercivity of the film. The antidot film shows a complex magnetoresistance (MR) behavior when the field direction is rotated due to the interplay between the induced easy axes along the antidot edges and the field and current directions. The MR response can be further modified by changing the composition of the film and antidot and by introducing an insulating barrier around the antidots.

Keywords

Permalloy; arrays; coercive force; ferromagnetic materials; magnetic anisotropy; magnetic thin films; magnetoresistance; nanostructured materials; nanotechnology; MR response; anisotropic magnetoresistance effect; antidot edges; coercivity; complex magnetoresistance behavior; current directions; etched array; ferromagnetic film; field direction; field directions; induced easy axes; insulating barrier; lateral antidot arrays; magnetic properties; micromagnetic modeling; permalloy; square holes; submicron-size range; transport modeling; Anisotropic magnetoresistance; Coercive force; Etching; Geometry; Magnetic anisotropy; Magnetic films; Magnetic properties; Micromagnetics; Perpendicular magnetic anisotropy; Solid modeling;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.801946

Filename

1042265