First-principles calculations have been performed for the exchange interaction and exchange force between two magnetic Fe(100) thin films. It is shown that the magnitude of the calculated exchange force is of the order of 10−9N at d/a<1 and of the order of 10−10N at 1<d/a<1.5, where d denotes the distance between surfaces of the two thin films and a the lattice constant of bulk Fe. The obtained forces are sufficiently larger than the sensitivity of the current atomic force microscopy of 10−12−10−13N, which suggests the feasibility of the exchange force microscopy.
@article{arxiv.cond-mat/9705149,
title = {First-principles calculation of exchange interaction and exchange force between magnetic Fe films},
author = {Kohji Nakamura and Hideo Hasegawa and Tamio Oguchi and Kazuhisa Sueoka and Kazunobu Hayakawa and Koichi Mukasa},
journal= {arXiv preprint arXiv:cond-mat/9705149},
year = {2009}
}