Exchange Model for Oscillatory Interlayer Coupling and Induced Unidirectional Anisotropy in $[\mathrm{Pt}/\mathrm{Co}{]}_3/\mathrm{NiO}/[\mathrm{Pt}/\mathrm{Co}{]}_3$ Multilayers

A Comment on the Letter by Z. Y. Liu and S. Adenwalla, Phys. Rev. Lett. 91, 037207 (2003).

Figure 1

(a) Interlayer exchange coupling as a function of the number of NiO (111) MLs, $N$, for $J_{\mathrm{Co}/\mathrm{NiO}}=0.3\mathrm{erg}/{\mathrm{cm}}^2$. (b) Magnetization versus applied field for $N=4$. (c) Same as (b) in the presence of bias field in the bottom film.