Title :
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
fDate :
7/1/2001 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
