This paper has been withdrawn due to a request of the first author to exclude his name from the author list and to motivate sufficiently the appliclication of the used model for antiferromagnetic insulators.
Cite
@article{arxiv.cond-mat/0412362,
title = {Toroid Current States in Doped Antiferromagnetic Insulators},
author = {Igor S. Aranson and Dmitry I. Iudin and Alexander P. Protogenov},
journal= {arXiv preprint arXiv:cond-mat/0412362},
year = {2007}
}