Effect of Zn substitution on relaxation characteristics and dielectric properties of Cu1−xZnxGa0.5Fe1.5O4 spinel

Size and crystallinity-dependent magnetic properties of copper ferrite nano-particles

“…The resulting ferrites show a smaller tetragonal distortion since a great proportion of the cupric ions are located on tetrahedral sites. Finally, Cu-ferrite powders can be stabilized in either tetragonal or cubic phase even at room temperature depending on nature and conditions of preparation process [7,12,15,18,[52][53][54][55][56][57]. This study revealed that the CuFe 2 O 4 crystallites can be stabilized in cubic phase with the G/N ratio in the range of 0.67-2 and also stabilized in mixture of cubic and tetrahedral phases above this limit.…”

Dielectric properties of Cu substituted Ni0.5−xZn0.3Mg0.2Fe2O4 ferrites

“…Fayek et al [4] have reported effect of Zn substitution on dielectric properties of Cu 1−x Zn x Ga 0.5 Fe 1.5 O 4 ferrite prepared by solid state method. Their results of frequency dependent dielectric loss (tan ı) behavior show relaxation spectra, where the authors determine relaxation time and the maximum frequency for the hopping mechanism.…”

AC conductivity and dielectric properties of, Zn1−Cu Cr0.8Fe1.2O4 spinel ferrites

“…Fayek et al [1] had studied Cu 1−x Zn x Ga 0.5 Fe 1.5 O 4 prepared at a sintering temperature at 1000-1210 • C for 8 h, then slowly cooled to room temperature. El-Sayed [8] had prepared two systems Ni 1−x Zn x Fe 2 O 4 and Ni 0.6 Zn 0.4 Cr y Fe 2−y O 4 , by the standard ceramic method with sintering at 1250 • C. Zakaria et al [9] had prepared the system Zn x Ni 1−x FeCrO 4 by solid state sintering and the optimum sintering temperature, as determined by trial and error method, was found to be 1523 K. All previously mentioned researches had not reported any significant change in chemical stoichiometry.…”

“…The characteristic physical properties of the spinel ferrites arise from the ability of these compounds to distribute the cations amongst the available tetrahedral A-sites and octahedral B-sites [1]. The dielectric properties of ferrites depend upon several factors including the method of preparation, chemical composition and grain structure or size [2].…”