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

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11 Author(s)
Xu, Y.B. ; Cavendish Lab., Cambridge Univ., UK ; Hirohata, A. ; Gardiner, S.M. ; Tselepi, M.
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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

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Magnetics, IEEE Transactions on  (Volume:37 ,  Issue: 4 )