Fabrication of ordered Fe-Ni nitride film with equiatomic Fe/Ni ratio

We successfully grew a single-phase tetragonal FeNiN film with an equiatomic ratio of Fe, Ni, and N on a MgO(001) substrate by molecular beam epitaxy. We then demonstrated the formation of Fe2Ni2N films by extracting N atoms from the FeNiN film. These results suggested that Fe and Ni atoms in the Fe2Ni2N film were L1(0)-ordered along the film plane direction because of the a-axis orientation growth of the FeNiN film on the MgO(001) substrate. (C) 2018 The Japan Society of Applied Physics.