Abstract
Tetragonally ordered Fe2Ni2N powder was successfully synthesized from L10-FeNi using a nitrogen topotactic reaction. The magnetic properties and structural stability of the tetragonally ordered Fe2Ni2N were examined using first principles calculations. The nitriding process gives 96 wt% of tetragonally ordered Fe2Ni2N phase and the rest is the more nitrided phase of FeNiN. Analysis of the crystal structure confirmed that the c/a is 0.989 for the tetragonally ordered Fe2Ni2N, which is consistent with the results of the first-principles calculations. Magnetization measurements reveal that the Curie temperature and thermal decomposition temperatures are 441 and 667 K, respectively. The high field magnetization processes at 10 K indicate that the sample contains a component of high magnetic anisotropy energy Ku. The Ku estimated by the law of approach to ferromagnetic saturation is 1.51 MJ/m3, which is in reasonably good agreement with that obtained by the first-principles calculations 1.96 MJ/m3.
Original language | English |
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Article number | 161122 |
Journal | Journal of Alloys and Compounds |
Volume | 885 |
DOIs | |
Publication status | Published - 2021 Dec 10 |
Keywords
- Curie temperature
- First principles calculations
- Magnetism
- Nitriding
- Topotactic reaction
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry