Magnetic and electrical properties of iron nitride films containing both amorphous matrices and nanocrystalline grains

Abstract

We have investigated the magnetic and electrical properties of iron nitride films containing both amorphous matrices and nanocrystalline grains. It is found that both the number and the size of the grains in the amorphous matrix increase as the film thickness increases. The grain is confirmed to have an 1-Fe 3 N structure and the grain size varies in the range of 10 -300 nm. The saturation magnetization and the coercivity increase as the number and the size of the grains increase. The electrical resistivity of the iron nitride films is higher than that of the iron film. It is considered that the amorphous matrices cause the high resistivity in the iron nitride films. q

Influence of Oxygen Flow Rate on the Properties of FeOXNY Films Obtained by Magnetron Sputtering at High Nitrogen Pressure

“…Thus, this high value of electrical resistivity (4.01 × 10 6 µΩ cm or 4.77 × 10 6 µΩ cm) is an important indication for the absence of the magnetite in the sample. Based on the electrical resistivity results and the literature [34,35], we can say that the film deposited with 0.4 sccm and The nitride coating exhibits an electrical resistivity lower than 200 µΩ cm, which is consistent with the metallic character of iron nitride [31]. The behavior of the resistivity in nitrides is a very complex subject, depending not only on composition but also on parameter such as crystalline structure [32,33].…”

“…The effect of the oxygen flow rate on the electrical resistivity of the films is displayed in Figure 5. The nitride coating exhibits an electrical resistivity lower than 200 µΩ cm, which is consistent with the metallic character of iron nitride [31]. The behavior of the resistivity in nitrides is a very complex subject, depending not only on composition but also on parameter such as crystalline structure [32,33].…”

The Silver Ion and Nanocrystalline Pattern in the Glass Substrate, the Electric Field-Induced Thermal Transfer and Ink Absorption Layer Structure and Printing Performance

“…As shown in the figure, these two peaks are added based on the original polishing, which causes this phenomenon. e reason is largely related to oxygen defects in nanocrystals [27].…”

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

“…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]. Recently, synthesis and characterization of nanocrystalline iron nitride have been attracting widespread attention because of their unique magnetic properties and the improved performances determined by their particle sizes, surface structures and inter-particle interaction [18][19][20][21][22][23][24][25]. Nevertheless, nanocrystalline iron nitride films show an extraordinary coercivity because of the stress, morphology and size distribution of the nanoparticles.…”

“…Xu et al [21] also synthesized iron nitride nanoparticles with a gas-aggregation nanocluster deposition technique, which could potentially generate pure metastable ␣ -Fe 16 N 2 phase nanoparticles. Using direct current magnetron sputtering technique, Yamamoto and co-workers [24] obtained an -Fe 3 N structure with the grain size in the range of 10-300 nm. It turned out that the coercivity of the film increased with increasing the grain size.…”