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Thickness variation of the magnetic anisotropy in DyFe thin films using magneto-optical techniques

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3 Author(s)
Carey, R. ; Centre for Data Storage Mater., Coventry Univ., UK ; Dieu, L. ; Newman, D.M.

Magneto-optical measurements of the anisotropy of homogeneous Dy 18Fe82 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⩽ the shape anisotropy (Ks=2πMs2)

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Magnetics, IEEE Transactions on  (Volume:33 ,  Issue: 5 )