Structural and Electrical Characterization of Mn-Zn Substituted CaSr2: W-Type Hexaferrite

Abstract

Abstract
In the present investigation the samples with chemical composition CaSr2 (Mn-Zn)x/2Fe16- xO27 (x= 0.2, 0.4, 0.6, 0.8, 1.0) have been synthesized by using chemical co-precipitation method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to study structure, lattice constants, crystallites size, x-ray density, bulk density, porosity and shape of ferrite powders. The prepared samples were found to have W-type hexagonal structure with the lattice parameters a= (5.77 Å–5.82 Å) and c= (33.08–33.47 Å). The average crystallites size calculated from XRD analysis is found to be 27.9 nm. The dependence of conductivity, dielectric constant and dielectric loss tangent on both the frequency and temperature was studied by using impedance analyzer. The increase in conductivity with an increase in temperature shows a semiconducting behavior of the compound. The room temperature (RT) resistivity varies from 5.38x105Ω-cm to 1.43x108Ω-cm with the doping concentration.
Keywords: XRD, VSM, electrical properties, hysteresis

Cite this Article
A.K. Akant, C.L. Khobaragade. Structural and Electrical Characterization of Mn-Zn Substituted CaSr2: W-Type Hexaferrite. Research & Reviews: Journal of Physics. 2016; 5(1): 11–17p