Abstract
The effects of substitutions at different concentrations within the lattice of CrO 2 are investigated assuming ordered configurations. For this purpose we use self-consistent band structure calculations based on the local spin density approximation. All results show an antiparallel spin alignment between host Cr and the substitutional M=Ir, Os, Pt. Depending on the nature of M and its concentration, CrO 2 transforms from a half metallic ferromagnet to a half-metallic or metallic ferrimagnet
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