Cation distribution by Rietveld, spectral and magnetic studies of chromium-substituted nickel ferrites

• Published in: Applied physics. A, Materials science & processing Vol. 95; no. 2; pp. 429 - 434
• Main Authors: Patange, S. M., Shirsath, Sagar E., Toksha, B. G., Jadhav, S. S., Shukla, S. J., Jadhav, K. M.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.05.2009; Springer
• Subjects: Cations; Characterization and Evaluation of Materials; Chromium; Concentration (composition); Condensed Matter Physics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Curie temperature; Diffraction; Domain effects, magnetization curves, and hysteresis; Exact sciences and technology; Inorganic compounds; Machines; Magnetic properties and materials; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Manufacturing; Nanotechnology; Nickel ferrites; Optical and Electronic Materials; Physics; Physics and Astronomy; Processes; Saturation (magnetic); Scanning electron microscopy; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Surfaces and Interfaces; Thin Films; 61.10.Nz; 75.50.Gg; 75.30.Cr; Ferrites; Scanning electron microscopy; Rietveld method; Curie point; Chemical precipitation; Crystallographic site; Chemical composition; XRD; Infrared spectra; Ion distribution; Coprecipitation; Saturation magnetization
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-008-4897-0

Ultrafine crystals of chromium-substituted nickel ferrite were prepared by wet chemical co-precipitation method using sulphates of respective metal ions. Formation of these materials has been confirmed by X-ray powder diffraction method. The fine crystal nature of these materials is evidenced from scanning electron microscope (SEM). Cation distribution has been investigated using X-ray diffraction technique. Cation distribution indicates that chromium occupy octahedral site for all the values of composition  x . The saturation magnetization and magneton number both are decreasing with increase of chromium concentration  x . The decrease in saturation magnetization and magneton number is attributed to the substitution of the Cr 3+ ions. Curie temperature ( T C ) from susceptibility plot is found to decrease with Cr concentration  x . Curie temperature of all the compositions are also obtained theoretically and it agrees with observed Curie temperature.