Abstract
Magneto-optical measurements of the anisotropy of homogeneous Dy/sub 18/Fe/sub 82/ films as a function of thickness (134.0-13.4 nm) confirm that the perpendicular anisotropy disappears when films are less than 60 nm thick. Since, the range of films exhibits both out of plane and in-plane anisotropy, both the polar Kerr effect and the transverse Kerr effect were used to determine the anisotropy. At about 60 nm the perpendicular anisotropy K/sub /spl perp///spl les/ the shape anisotropy (K/sub s/=2/spl pi/M/sub s//sup 2/).
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