α″-Fe₁₆N₂ problem - giant magnetic moment or not

We reviewed the present situation of the α″-Fe₁₆N₂ problem for α″-Fe₁₆N₂ films with and without giant magnetic moment in connection with structure and magnetic moment. The results of XRD and TEM analysis did not show any difference between α″-Fe₁₆N₂ films with and without giant magnetic moment. The Moessbauer spectrum was quite different in each case. The hyperfine field of Fe₁₆N₂ film synthesized by the present authors splits into three hyperfine field interactions. However for the Fe₁₆N₂ with giant magnetic moment, hyperfine field interaction did not split and is almost the same as that of pure α-Fe. Therefore, the interpretation of Moessbauer spectra is the key item to solve the α″-Fe₁₆N₂ problem.