Effects of interdot dipole coupling in mesoscopic epitaxial Fe(100) dot arrays

Author

Xu, Y.B. ; Hirohata, A. ; Gardiner, S.M. ; Tselepi, M. ; Rothman, J. ; Kläui, M. ; Lopez-Diaz, L. ; Bland, J.A.C. ; Chen, Y. ; Cambril, E. ; Rousseaux, F.

Author_Institution

Cavendish Lab., Cambridge Univ., UK

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

2055

Lastpage

2057

Abstract

The domain structure and the coercivity of epitaxial Fe(100) circular dot arrays of different diameters and separations have been studied using magnetic force microscopy (MFM) and focused magneto-optical Kerr effect (MOKE). The MFM images of the 1 μm diameter single domain dot arrays show direct evidence of strong interdot dipole coupling when the separation is reduced down to 0.1 μm. The coercivity of the dots is also found to be dependent on the separation, indicating the effect of the interdot dipole coupling on the magnetization reversal process

Keywords

arrays; coercive force; magnetic domains; magnetic epitaxial layers; magnetic force microscopy; magnetic moments; magnetic particles; magnetic storage; magnetisation reversal; nanostructured materials; 1 μm diameter; 1 mum; Fe; Fe(100) dot arrays; coercivity; domain structure; focused magneto-optical Kerr effect; interdot dipole coupling; magnetic force microscopy; magnetization reversal; mesoscopic epitaxial dot arrays; micromagnetism; separation 0.1 μm; single domain dot arrays; Coercive force; Couplings; Iron; Magnetic anisotropy; Magnetic domains; Magnetic force microscopy; Magnetic memory; Magnetic separation; Perpendicular magnetic anisotropy; US Department of Transportation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951051

Filename

951051