Instability of the double-exchange-induced canted antiferromagnetic ordering

The energy of the charge-carrier-induced canted ordering is calculated in stripe antiferromagnetic conductors with the double exchange. The quantum approach to the d spins is used. In the jellium model the energy of the canted state is lower than the energies of both collinear ferro- and antiferromagnetic states in a certain range of charge-carrier densities, beginning from arbitrarily small densities. But, nevertheless, the canted state cannot be realized since it is unstable with respect to charge-carrier density fluctuations. The two-phase ferro-antiferromagnetic state can play the role of an alternative to the canting.