From Ferromagnetism to Spin-Density Wave: Magnetism in the Two Channel Periodic Anderson Model

The magnetic properties of the two channel periodic Anderson model for uranium ions, comprised of a quadrupolar and a magnetic doublet are investigated through the crossover from the mixed-valent to the stable moment regime using dynamical mean field theory. In the mixed-valent regime ferromagnetism is found for low carrier concentration on a hypercubic lattice. The Kondo regime is governed by band magnetism with small effective moments and an ordering vector $\underset{¯}{q}$ close to the nesting vector $\underset{¯}{Q}=\pi (1,1,\dots )$. In the stable moment regime nearest neighbor antiferromagnetism dominates for less than half band filling and a spin-density wave transition for larger than half filling.