Effect of Fe Substitution on Microstructure and Magnetic Properties of Ni{sub 1−x}Fe{sub x}O{sub 2} Nanoparticles
- Vellore Institute of Technology, Thin Films Laboratory, School of Advanced Sciences (India)
- VIT-AP, Department of Physics (India)
- Sungkyunkwan University, School of Advanced Materials Sciences and Engineering (Korea, Republic of)
- Sungkyunkwan University, Department of Physics and Sungkyunkwan Advanced Institute of Nanotechnology (SAINT) (Korea, Republic of)
- Indira Gandhi Centre for Atomic Research, Materials Physics Division (India)
Fe-substituted NiO nanoparticles (Ni{sub 1−x}Fe{sub x}O{sub 2}) (x= 0.00, 0.03, 0.05, 0.07, and 0.09) were synthesised using ball-milling method followed by vacuum sintering and studied for their microstructural and magnetic properties. All the samples show a cubic structure with a crystallite size of 17–26 nm. Secondary phases related to Fe{sub 2}O{sub 3} were identified from XRD, indicating that the observed ferromagnetism may be due to the dopants. The doping of Fe ions does not cause any significant variation in the crystal structure. The pure NiO nanoparticles were weak ferromagnetic in nature, and Fe-doped NiO nanoparticles exhibit room temperature ferromagnetism. The strength of magnetization increased from 0.57 to 0.94 emu/g with an increase of Fe concentration from 3 to 7 at.%, respectively. A high coercive field of 173 Oe was observed for the Ni{sub 1−x}Fe{sub x}O{sub 2} nanoparticles at x= 0.09. The results and the process of development of ferromagnetism at room temperature in the Ni{sub 1−x}Fe{sub x}O{sub 2} nanoparticles were presented and discussed in detail.
- OSTI ID:
- 22773829
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 9; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONCENTRATION RATIO
CRYSTAL STRUCTURE
DOPED MATERIALS
FERROMAGNETISM
IRON IONS
IRON OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
MICROSTRUCTURE
MILLING
NANOPARTICLES
NICKEL OXIDES
SINTERING
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION