We investigate the dipolar-exchange spin wave spectrum in thin ferromagnetic bilayers with inplane magnetization, incorporating interlayer exchange coupling and intra- and interlayer dipolar interactions. In the continuum approximation we analyze the nonreciprocity of propagating magnetic stray fields emitted by spin waves as a function of the relative orientation of the layer magnetizations that are observable by magnetometry of synthetic antiferromagnets or weakly coupled type-A van der Waals antiferromagnetic bilayers as a function of an applied magnetic field.
@article{arxiv.2504.00631,
title = {Dipolar-exchange spin waves in thin bilayers},
author = {Rob den Teuling and Ritesh Das and Artem V. Bondarenko and Elena V. Tartakovskaya and Gerrit E. W. Bauer and Yaroslav M. Blanter},
journal= {arXiv preprint arXiv:2504.00631},
year = {2026}
}