Conditions for the Spin-Spiral State in Itinerant Magnets
The spin-spiral (SS) type of magnetization is studied with the Hubbard model. Consideration of noncollinearity of the magnetic moments results in a phase diagram which consists of regions of the SS and paramagnetic states depending on the number of electrons nel and the parameter U/t (U is the Hubbard repulsion, and t is an overlap integral). A possibility of stabilization of the SS state with three nonzero components of magnetic moment is considered.
M.A. Timirgazin and A. K. Arzhnikov, "Conditions for the Spin-Spiral State in Itinerant Magnets", Solid State Phenomena, Vols. 152-153, pp. 559-562, 2009