Structure and dielectric properties of ZnMn2O4/NiFe2O4 nanocomposite

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2021-08, Vol.127 (8), Article 577
• Main Authors: Heiba, Zein K., Mohamed, Mohamed Bakr, El-naggar, A. M., Altowairqi, Y.
• Format: Article
• Language: English
• Subjects: Alloying effects; Applied physics; Characterization and Evaluation of Materials; Condensed Matter Physics; Crystallites; Dielectric properties; Ferroelectricity; Impedance; Lattice parameters; Machines; Manufacturing; Materials science; Nanocomposites; Nanotechnology; Nickel ferrites; Optical and Electronic Materials; Oxidation; Photoelectrons; Physics; Physics and Astronomy; Processes; Sol-gel processes; Surfaces and Interfaces; Thin Films; X ray photoelectron spectroscopy; Zinc compounds
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-021-04731-2

(1-x)ZnMn 2 O 4 /xNiFe 2 O 4 ( x  = 0, 0.05, 0.1, 0.15, 0.2) nanocomposite system was prepared using the sol–gel technique. Rietveld analysis revealed the presence of two phases ZnMn 2 O 4 and NiFe 2 O 4 for all composites, but with phase percentages different from nominated values of ( x ). The effect of alloying parameter ( x ) on the lattice parameters and crystallite size of the obtained phases was also examined. The oxidation states of different ions were determined using X-ray photoelectron spectroscopy (XPS) technique. For the prepared nanocomposite samples, the dependence of dielectric constant, impedance and electric modulus on the frequency and temperature was performed using complex impedance technique. It was found that the obtained samples have ferroelectric characteristics. The degree of correlation for the different nanocomposite samples was explored using ac conductivity.