Spiral magnetic order in the one-dimensional kondo lattice

The effects of c-f (conduction-f electrons) hybridization on the spiral spi n magnetism in the one-dimensional Kondo lattice are studied. By using the mean-held approximation, a close set of equations of the Green's functions with arbitrary wave vector Q for the spiral ordering of spins is deduced. T he magnetic phase boundary between the spiral magnetism and ferromagnetism has been calculated approximately. From our qualitative results, one can fi nd that the ferromagnetic region is enlarged due to the c-f hybridization. Moreover, some new results reflecting the Kondo effect, such as the modifie d dispersion relation and the weakening of the localized magnetic moments a re also obtained.