Publications in Scientific Journals:

R. Lizárraga, L. Nordström, L. Bergqvist, A. Bergman, E. Sjöstedt, P. Mohn, O. Eriksson:
"Conditions for Noncollinear Instabilities of Ferromagnetic Materials";
Physical Review Letters, 93 (2004), 10; 107205-1 - 107205-4.

English abstract:
Two criteria have been identified here which determine whether a magnetic metal orders in a
collinear (e.g., ferromagnet) or noncollinear (e.g., spin-spiral) arrangement. These criteria involve the ratio between the strength of the exchange interaction and the width of the electron bands, as well as Fermi-surface nesting between spin-up and spin-down sheets of the Fermi surface. Based on our analysis we predict that even typical ferromagnetic materials (e.g., Fe, Co, and Ni) should be possible to stabilize in a noncollinear magnetic order in, e.g., high pressure experiments.
DOI: 10.1103/PhysRevLett.93.107205 PACS numbers: 75.25.+z

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