Mössbauer Effect Study of Face-Centered Cubic Fe Nitrides (Nitrogen Austenite)

In order to investigate the magnetic properties of fcc Fe(γ-Fe), the Mossbauer effect was measured in fcc Fe nitrides, FeN 0.08-0.11 . Specimens were prepared in fine particles to avoid the martensitic transformation at low temperatures. No magnetic ordering was found down to 1.3 K and hence the magnetic moment on the Fe atom is expected to be small in these fcc Fe nitrides. The results are discussed in connection with fcc Fe precipitated in Cu.