Canted spiral magnetic order in layered systems
  Formation of a canted spiral magnetic order is studied in the framework of a mean-field approximation of the Hubbard model. It is revealed that this magnetic state can be stabilized under certain conditions in layered systems with a relatively small interplane electron hopping. Example of an experimentally observed magnetic structure of La$_{2-x}$Sr$_x$CuO$_4$ is considered. It is shown that the canting magnetic order can be described in terms of a simple non-relativistic band magnetism. 
M. A. Timirgazin, V. F. Gilmutdinov, A. K. Arzhnikov
cond-mat.str-el