Magnetic properties and structure of the α″-Fe16N2 films

Formation and Decomposition of Metastable α′′‐Fe16N2 from in situ Powder Neutron Diffraction and Thermal Analysis

“…Great improvements in yield www.zaac.wiley-vch.de of αЈЈ-phase were achieved producing thin films with different techniques like evaporation-deposition, [11,[36][37][38][39] ion implantation, [40][41][42] molecular beam epitaxy, [43][44][45][46][47] and sputtering methods. [46,[48][49][50][51][52][53][54] The synthesis of bulk αЈЈ-Fe 16 N 2 in single phase is more difficult. [55] Various ways to generate nitrogen austenite and martensite were applied by different groups.…”

“…In the case of thin film synthesis high purity samples can be achieved, but the measured magnetic moments strongly depend on the substrate used to generate the film and the deposition method. [11,[36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54] The values of the formation enthalpy of different iron nitrides were investigated through oxidative drop solution calorimetry. By linear extrapolation depending on the nitrogen content, the enthalpy of formation of the αЈЈ-phase was estimated to 85 Ϯ 47 kJ·mol -1 , thus this phase is metastable against decomposition into α-Fe and N 2 .…”

Investigation on the structure and magnetic properties at low temperature for nanocrystalline γ′-Fe4N thin films

“…Iron nitride films have received many attentions because of their excellent magnetic properties [1][2][3][4][5][6][7][8][9][10][11] and their ability to improve surface hardness and wear resistance [12] for application in magnetic devices. It is well known that some iron nitrides such as -Fe 3 N (hcp), ␥ -Fe 4 N (fcc) and ␣ -Fe 16 N 2 (bct) are magnetic phases [13][14][15].…”

Structural and magnetic properties of nanocrystalline Fe–N thin films and their thermal stability

“…Iron nitride films have received many attentions over the past decades because of their excellent magnetic properties, which make them suitable for applications in high density magnetic storage devices [1][2][3][4][5][6][7][8]. Since the first report on the possible 'giant-moment' ␣ -Fe 16 N 2 phase by Kim and Takahashi, ferromagnetic iron nitride compounds, such as ␣-Fe (N), -Fe 3 N (hcp), ␥ -Fe 4 N (fcc), and ␣ -Fe 16 N 2 (bct), have been intensively investigated [9][10][11][12][13][14][15][16][17].…”