Abstract:In a recent article [J. Appl. Phys. 80, 1678 (1996)] Aksenov et al. reported on electron paramagnetic resonance (EPR) studies in β-FeSi2 crystals grown by chemical vapor transport. They did not perform a rigorous measurement of the angular variation of the EPR line positions. Consequently, there has been a drastic loss of information and most of their conclusions turn out to be erroneous. It is shown that the anisotropic signals (Ai,Bi) do not arise from spin triplet states but from centers with S=1/2 and thei… Show more
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