Magnetic properties of thermal plasma synthesized nanocrystalline nickel ferrite (NiFe2O4)

TitleMagnetic properties of thermal plasma synthesized nanocrystalline nickel ferrite (NiFe2O4)
Publication TypeJournal Article
Year of Publication2011
AuthorsNawale, AB, Kanhe, NS, Patil, KR, Bhoraskar, SV, Mathe, VL, Das, AK
JournalJournal of Alloys and Compounds
Date PublishedMAR
Keywordscrystal structure, Magnetic measurements, Magnetization, Nanostructured materials, TEM

A rapid synthesis method is reported for magnetic nanoparticles of nickel ferrite involving thermal plasma assisted vapor phase condensation process. The as-synthesized samples were characterized by X-ray Diffraction, Transmission Electron Microscopy, Vibrating Sample Magnetometer and X-ray Photoelectron Spectroscopy techniques. The average particle size was determined from the TEM micrographs and found to be around 30 nm. The effects of reactor parameters on the magnetic and structural properties have been evaluated, to find the optimized parameters so as to achieve the highest values of saturation magnetization and coercivity. Reasonably high saturation magnetization (48 emu/g) has been assigned to the high degree of crystallinity, achieved on account of high temperature during the growth, and the cation redistribution. The high value of coercivity (1150e) is explained on the basis of possible lattice defects arising from the cation redistribution. Detailed analysis of cation distribution using the XRD line intensity data leads to the conclusion that these samples are iron deficit and nickel rich. (C) 2011 Elsevier B.V. All rights reserved.

Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)2.56
Divison category: 
Center for Material Characterization (CMC)