Noncollinear magnetic ordering in small chromium clusters
Noncollinear magnetic ordering in small chromium clusters
We investigate noncollinear effects in antiferromagnetically coupled clusters using the general, rotationally invariant form of local spin-density theory. The coupling to the electronic degrees of freedom is treated with relativistic nonlocal pseudopotentials and the ionic structure is optimized by Monte Carlo techniques. We find that small chromium clusters $(N<~13)$ strongly …