Crystallographic phases and magnetic properties of iron nitride films
| Autor: | Pu-Jia Shan, Shang Wang, Jun-Jie Shen, D. L. Hou, Guoke Li, Rui-Bin Zhao, Congmian Zhen, Yan Liu |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Magnetic moment Metals and Alloys chemistry.chemical_element Surfaces and Interfaces Nitride Nitrogen Surfaces Coatings and Films Electronic Optical and Magnetic Materials Magnetization Crystallography Iron nitride chemistry.chemical_compound Lattice constant chemistry Materials Chemistry Spin (physics) Deposition (law) |
| Zdroj: | Thin Solid Films. 589:22-26 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2015.04.080 |
| Popis: | Iron nitride films, including single phase films of α -FeN (expanded bcc Fe), γ′ -Fe 4 N, e -Fe 3 − x N (0 ≤ x ≤ 1), and γ″ -FeN, were sputtered onto AlN buffered glass substrates. It was found possible to control the phases in the films merely by changing the nitrogen partial pressure during deposition. The magnetization decreased with increased nitrogen concentration and dropped to zero when the N:Fe ratio was above 0.5. The experimental results, along with spin polarized band calculations, have been used to discuss and analyze the magnetic properties of iron nitrides. It has been demonstrated that in addition to influencing the lattice constant of the various iron nitrides, the nearest N atoms have a significant influence on the exchange splitting of the Fe atoms. Due to the hybridization of Fe-3 d and N-2 p states, the magnetic moment of Fe atoms decreases with an increase in the number of nearest neighbor nitrogen atoms. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect