Journal of Nanomedicine & Nanotechnology

Structural and magnetic properties of nickel-cobalt nanomaterials synthesized by citrate-gel auto combustion method

4^th International Conference on Nanotek & Expo

December 01-03, 2014 DoubleTree by Hilton Hotel San Francisco Airport, USA

Abdul Gaffoor and D Ravinder

Accepted Abstracts: J Nanomed Nanotechnol

Abstract:

Nano-ferrites of the composition Ni1-xCoxFe2O4 (where x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) were synthesized at a very low temperature (180?C) by citrate-gel auto combustion method. The synthesized powders were sintered at 500?C for four hours in an air and were characterized by X-ray diffraction (XRD) which confirmed the formation of cubic spinel structure of ferrites. The crystallite size was in the range of 20 nm to 31 nm. Nanosized ferrites with uniform particle size and narrow size distribution are desirable for a variety of applications like targeted drug delivery, medical imaging magnetic data storage, and other biomedical applications, magnetic data storage, etc. Morphological studies by Transmission electron Microscopy (TEM), Scanning Electron Microscopy (SEM) revealed formation of largely agglomerated, well defined nano particles of the sample. Elemental composition characterizations of the prepared samples were performed by Energy Dispersive Spectroscopy (EDS) which shows the presence of Ni, CO, Fe and O without precipitating cations. Magnetic properties of Ni-Co nanoferrites were measured using a vibrating sample magnetometer at roomtemperature in the applied field of 15 kOe. The specific saturation magnetization (Ms), remanent magnetization (Mr) and the coercivity (Hc) of the spinel ferrites are further improved by the substitutions of Co+2 ions.