Abstract This study aimed to investigate the optical, electric and dielectric properties of the Ni0·5Co0.5-xCdxNd0.02Fe1·78O4 (x ≤ 0.25) NFs prepared via electrospinning process. Diffuse reflectance spectroscopic (DRS) measurements were performed on pristine… Click to show full abstract
Abstract This study aimed to investigate the optical, electric and dielectric properties of the Ni0·5Co0.5-xCdxNd0.02Fe1·78O4 (x ≤ 0.25) NFs prepared via electrospinning process. Diffuse reflectance spectroscopic (DRS) measurements were performed on pristine and all Cd-substituted NFs samples. Direct bandgap energies (Eg) were extracted from the Tauc fits which were estimated in a range between 1.65 and 1.85eV. The electrical conduction mechanism and dielectric functions of Ni0·5Co0.5-xCdxNd0.02Fe1·78O4 NFs were comprehensively examined as functions of frequency, temperature and Cd ions substitution ratio in a 3D semi-logarithmic plot using the complex impedance spectroscopy technique. The substitution ratio has a robust influence on dielectric parameters including dielectric loss, dielectric constant, and dissipation factor while the Cd ion substitution has a weak effect on the conductivity mechanism. The activation energy values changed to a level lower than 400 meV with increasing the “x” values.
               
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