Synthesis, physical characterization, elastic and electrical properties of Cd-Ni nano ferrites

Spinal nanoferrites are considered superior to other magnetic materials because they have low eddy current losses due to high electrical resistivity. The possibility of preparing ferrites at the nano-scale has extended the application in biotechnology as well as in medicines. This talk reports the synthesis, physical characterization, elastic and electrical properties of Cd-Ni nanoferrites using very simple laboratory tools.The soft spinal ferrite system Ni1-xCdxFeO4 (x=0.0, 0.2, 0.4, 0.6) have been synthesized by the co-precipitation method. The prepared samples are characterized by the x-ray diffraction (XRD) and FTIR techniques. The XRD data have been used to obtain lattice constants, average crystallite size, specific surface area and strain of the nanoferrites. The data also provided the cation distribution, indicating that Fe3+ occupies both the A and B-sites. The elastic properties of this system are studied through infra-red spectroscopy and XRD data. The force constants for tetrahedral (kt) and octahedral (k0) sites are estimated along with the Poisson‟s ratio and the Debye temperature (ѲD).The dc electrical resistivity as a function of temperature and the dielectric parameters including the ac electrical conductivity as a function of frequency at room temperature are also investigated for applications.

کلیدواژه ها:

Co-precipitation synthesis ، X- ray diffraction ، Resistivity ، Specific surface area ، Elastic properties