We calculate the energy of the magnetostatic interaction between two ferromagnetic films with uniform magnetization and correlated interfaces (the "orange-peel" effect). The "orange-peel" coupling is anisotropic: the interaction is ferromagnetic when the films are magnetized in-plane; and it is antiferromagnetic when magnetization is out-of-plane. The interaction anisotropy can be used to distinguish the "orange-peel" effect from the interlayer exchange coupling.
@article{arxiv.1807.05590,
title = {Anisotropy of Neel "orange-peel" coupling in magnetic multilayers},
author = {M. A. Kuznetsov and O. G. Udalov and A. A. Fraerman},
journal= {arXiv preprint arXiv:1807.05590},
year = {2018}
}