Crystallographic phases and magnetic properties of iron nitride films

Li, Guo-Ke; Liu, Yan; Zhao, Ran; Shen, Jizhong; Wang, Shang; Shan, Pu-Jia; Zhen, Congmian; Hou, Denglu

doi:10.1016/j.tsf.2015.04.080

Cited by 20 publications

(11 citation statements)

References 23 publications

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“…2 However, in a plasma based synthesis method, typically that are found in physical vapor deposition, increased ratio of nitrogen ions may assist the formation of some phases that do not exist in the bulk. Iron mononitride (FeN) is one such compound, which has been deposited frequently using reactive magnetron sputtering [3][4][5][6][7][8][9][10] and recently using nitrogen plasma assisted molecular beam epitaxy. 11 Theoretical studies suggest that the enthalpy of formation (∆H • f ) for FeN 12 is about -45 kJ mol −1 which is considerably higher (less negative) than that of early TM mononitrides e.g.…”

Section: Introductionmentioning

confidence: 99%

Self-diffusion processes in stoichiometric iron mononitride

Tayal

Pandey

Reddy

et al. 2021

Journal of Applied Physics

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In this work, we studied atomic self-diffusion and structural phase transformation in a single phase iron mononitride (FeN) thin film deposited at an optimized substrate temperature (T s ) of 423 K. At this T s , FeN film exhibit a tetrahedral coordination between Fe and N atoms (ZnS-type structure with lattice parameter of 4.28Å). The structure of FeN film was studied by combining x-ray diffraction with Fe and N K-edge x-ray absorption spectroscopy and conversion electron Mössbauer spectroscopy measurements. Selfdiffusion of Fe and N was measured using secondary ion mass spectroscopy depth profiling in trilayer structures: [FeN(50 nm)/ 57 FeN(2 nm)/FeN(50 nm)] and [FeN(50 nm)/Fe 15 N(2 nm)/FeN(50 nm)] deposited on an amorphous quartz substrate using reactive magnetron sputtering. It was found that atomic self-diffusion is strongly associated with the thermal stability. Before reaching the phase decomposition temperature, the self-diffusion of N was found to be slower than Fe. Upon phase decomposition, both Fe and N diffuse rapidly, and at this stage, the self-diffusion of N takes over Fe. Within the thermally stable state, slower N diffusion indicates that Fe-N bonds are stronger than Fe-Fe bonds in FeN. This behavior was predicted theoretically and has been evidenced in this work.

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Section: Introductionmentioning

confidence: 99%

Self-diffusion processes in stoichiometric iron mononitride

Tayal

Pandey

Reddy

et al. 2021

Journal of Applied Physics

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“…The reduction ofσ s and TC values with increasing interstitial content is well-known for ε-iron nitride [8,26,27]. The observed variation in magnetic properties can be explained from changes in the electronic band structure, which includes hybridization of the 2p states of C/N and the Fe 3d states [28][29][30][31]. Increasing the interstitial content increases the number of electrons in the partially filled band of minority spins.…”

Section: Magnetic Propertiesmentioning

confidence: 80%

Effect of carbon on interstitial ordering and magnetic properties of ε-Fe2(N,C)1-

Brink¹,

Ståhl

Christiansen

et al. 2017

Journal of Alloys and Compounds

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“…Increase of NFR generated monotonic reduction of the saturation magnetization throughout the entire NFR range, consistent with earlier studies. [5,7,8] It has been reported that further increase of nitrogen gas fraction during the growth process eventually incurs a complete disappearance of ferromagnetism in FeN films. [7,8] In the case of coercivities, non-monotonic dependence on NFR was observed.…”

Section: Methodsmentioning

confidence: 99%

“…[5,7,8] It has been reported that further increase of nitrogen gas fraction during the growth process eventually incurs a complete disappearance of ferromagnetism in FeN films. [7,8] In the case of coercivities, non-monotonic dependence on NFR was observed. The coercivities first decreased from 18 Oe of the pure Fe film to reach the minimum value at the film prepared at NFR of 1.4 sccm.…”

Section: Methodsmentioning

confidence: 99%

“…Especially, effect of nitrogen inclusion on the structural and magnetic properties of FeN films have been one of the mostly investigated subjects. [3][4][5][6][7][8][9][10] On the other hand, studies on high-frequency behaviors of FeN film have been seldom performed. [9,10] In this study, we report the results of intensive study of high-frequency characteristics of FeN thin films in which nitrogen contents were systematically varied through the deposition process.…”

Section: Introductionmentioning

confidence: 99%

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High-frequency behavior of FeN thin films fabricated by using reactive sputtering

Hwang

Lee

Kim

et al. 2016

Journal of the Korean Physical Society

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We investigated high-frequency behavior of FeN thin films prepared by reactive sputtering through ferromagnetic resonance (FMR) and its relationship with the static magnetic properties. The FMR was observed in the frequency range from 2 to 18 GHz in the FeN films fabricated at proper nitrogen flow rate (NFR). In those FeN thin films, a decrease of the saturation magnetization and the corresponding decrease of the FMR frequency were observed as NFR was increased during the deposition. The external field dependences of the FMR frequencies were well fit to the Kittel formula and the Landé g-factors determined from the fit were found to be very close to the free electron value. The high-field damping parameters were almost insensitive to the growth condition of NFR. However, the low-field damping parameters exhibited high sensitivity to NFR very similar to the dependence of the hard-axis coercivity on NFR, suggesting that extrinsic material properties such as impurities and defect structures could be important in deciding the low-field damping behavior.

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Crystallographic phases and magnetic properties of iron nitride films

Cited by 20 publications

References 23 publications

Self-diffusion processes in stoichiometric iron mononitride

Self-diffusion processes in stoichiometric iron mononitride

Effect of carbon on interstitial ordering and magnetic properties of ε-Fe2(N,C)1-

High-frequency behavior of FeN thin films fabricated by using reactive sputtering

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