Abstract
The relation between thickness and magnetic properties of CoPt perpendicular magnetic anisotropy film was investigated through experiments and micromagnetic simulation. The perpendicular nucleation field and saturation field decreased as the film thickness decreased, whereas the in-plane squareness ratio increased as the thickness decreased. The increase in in-plane squareness ratio with decreasing thickness was due to an expansion of the domain wall region that occurred with the decrease in thickness.
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