FE-N AND (FE, NI)-N FINE POWDERS FOR MAGNETIC RECORDING

Combining Mossbauer spectroscopy with magnetic property measurement we have studied Fe-N and (Fe, Ni)-N powders for magnetic recording. The typical particles of the core (alpha-Fe)/shen (gamma'-Fe4N) structure have been successfully prepared. All the products are stabilized in a multi-organic solution. It has been found that the coercivity can be c hanged from 300 to 800 Oe by adjusting the shape of the particles. The special saturation magnetization of the particles can be adjusted fro m 120 to 180emu/g and their chemical stability is improved by substitu ting nickel for iron in gamma'-Fe4N. Following experiments for corrosi on resistance, it is expected that (Fe, NI)-N and the core/shell parti cles will be applied as recording media in the near future.