Magnetic susceptibility and defect structure of B1 phase MoN sputtered films

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Abstract
The magnetic susceptibility of magnetron-sputtered B1 phase MoN films has been determined by magnetisation measurements with a Faraday balance. The electronic DOS at the Fermi level N(0) estimated from the susceptibility data is much lower than the band-structure value for an ordered compound. The discrepancy is explained by structural defects in the experimentally prepared films. Two models for defect structures appear to be consistent with the results of annealing experiments. One model suggests that nitrogen atoms are located on Mo sites accompanied by distortions of the Mo sublattice. The other model postulates structural instabilities when nitrogen is incorporated on the octahedral N sites beyond the gamma -Mo2N composition.