Conditions for noncollinear instabilities of ferromagnetic materials |
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Authors: | Lizárraga Raquel Nordström Lars Bergqvist Lars Bergman Anders Sjöstedt Elisabeth Mohn Peter Eriksson Olle |
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Institution: | Department of Physics, Uppsala University, Box 530, 751 21, Uppsala, Sweden. |
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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. |
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