The crystal structures of two half metals. (a) The Heusler alloy Co₂MnSi: The cobalt atoms are shown in red, the manganese atoms in green, and the silicon atoms in blue. (b) The spinel CuCr₂O₄: The copper atoms are shown in pink, the chromium atoms in light green, and the oxygen atoms in mustard yellow.

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© 2001 American Institute of Physics