Structural and physical properties of the nano-crystalline Al-substituted Cr–Cu ferrite

Annealing effect on the structural and magnetic properties of the CuAl 0.6 Cr 0.2 Fe 1.2 O 4 nano-ferrites

“…The CuAl 0.6 Cr 0.2 Fe 1.2 O 4 nano-particles were synthesized by the chemical coprecipitation method according the equation [ The techniques used were described as reported early [10]. The X-ray diffraction patterns were taken by using X-ray diffractometer of the type Shimadzu 7000 Maxima and CuKα radiation with wavelength λ=1.54056Å.…”

“…The present work is devoted to study the influence of annealing temperature on the structural, magnetic and electric properties of the CuAl 0.6 Cr 0.2 Fe 1.2 O 4 nano-particles which were prepared by the chemical co-precipitation method [10]. The techniques used are the Xray diffraction, Mössbauer and infrared spectroscopy and vibrating sample magnetometry.…”

Structural phase transformations of as-synthesized Cu-nanoferrites by annealing process

“…The nanoferrite sample was synthesized using the wet-chemical co-precipitation method as reported early [8,11,12]. Proportion amounts of high purity FeCl 3 and CuCl 2 .2H 2 O salts were dissolved in 0.1 M aqueous solutions and mixed at lower temperature by using magnetic stirrer.…”

“…The interplaner distance d was obtained using Bragg's law: nλ = 2d sin θ, where n is the order of lattice plane and θ is the diffraction angle. The lattice constant a for the cubic structure was The experimental and theoretical (X-ray) densities, sample porosity, hopping length at the tetrahedral A-sites and octahedral B-sites, oxygen positional parameter and other lattice parameters were calculated as explained early [11][12][13]. The crystallite size (R) of samples was determined using the prominent diffraction peaks (311) for cubic structure and (103) for tetragonal structure and Scherrer's equation:…”

“…The mean ionic radius of the A-and B-sublattices (R A and R B ) was calculated using the cationic distribution and equations [8,[11][12][13];…”