Mössbauer study of iron nitride films produced by pulsed laser deposition

Abstract

Iron nitride films were produced by pulsed laser deposition of Fe onto an Al substrate in an N 2 atmosphere and their Mössbauer spectra and powder X-ray diffraction patterns were measured. The nitrogen content of the iron nitride films varied depending on the N 2 pressure. Under high N 2 pressures, γ "-FeN (ZnS structure) and γ "'-FeN (NaCl structure) were obtained. The yields of these two phases could be controlled by varying the Al substrate temperature. γ "-FeN and γ "'-FeN were found to be paramagnetic and antiferromagnetic, respectively, at 5 K.

Accelerated Fe2+ Regeneration in an Effective Electro-Fenton Process by Boosting Internal Electron Transfer to a Nitrogen-Conjugated Fe(III) Complex

“…What is more, Mössbauer spectra of Fe-270 performed by 57 Fe under room temperature could help investigate the coordination environment of the Fe atom in the sample (Figure d). The spectrum exhibited a magnetically split doublet (D1) and the parameters of D1 indicated the presence of the Fe–N bond, which is consistent with previous literature studies as shown in Table S7. − …”

Effects of magnetic ordering and electron correlations on the stability of FeN

“…4 According to recent studies, lm samples can be prepared for both phases with physical vapor deposition methods. [6][7][8][9][10] Theoretical studies have attempted to clarify the magnetism and relative stability of rs and zb FeN, but with controversial results. For example, Shimizu et al 11 and Houari et al 1 showed that ferromagnetic (FM) rs-FeN is more stable than non-magnetic (NM) zb-FeN.…”

Iron Nitride Thin Films: Growth, Structure, and Properties

“…The PLD technique was successfully applied by various research groups for the growth of thin iron nitride films. − The growth usually relies on the introduction of N 2 into the vacuum system during Fe deposition. The main advantages of this method are the possibility to use low substrate temperatures during film growth (iron nitride formation was reported at 20 °C, which is much lower compared to other methods, such as molecular beam epitaxy (MBE) (250 °C) or sputter deposition (300 °C)) and to control the iron nitride phase with the change of nitrogen pressure …”

“…CEMS studies revealed that zinc blende phase exhibits a single peakindicative of paramagnetic ordering. 76 The rock salt phase shows a sextetwhich is characteristic of ferromagnetic and antiferromagnetic materials. In fact, the phase was confirmed to be antiferromagnetic, with a Neél temperature of 220 K. 128 One of the first reported spectra obtained for iron nitride with approximately 50% nitrogen content indicated the coexistence of both phases; 103 however, this interpretation was not definite.…”

“…The high nitrogen content phases, γ′′- and γ′′′-FeN, differ significantly in terms of magnetic properties, as compared to other iron nitrides. CEMS studies revealed that zinc blende phase exhibits a single peakindicative of paramagnetic ordering . The rock salt phase shows a sextetwhich is characteristic of ferromagnetic and antiferromagnetic materials.…”