Abstract
Abstract This work presents a study of Mn-Zn-Cu triphasic spinel ferrite according to Stoichiometry Cu(0.5-β) Znβ Mn0.5 Fe2O4 with β = 0.10, 0.20, 0.30 and 0.40 . The samples were produced by the conventional ceramic method of sintering, irrigated with partial oxygen pressure, following a determined thermal curve. The morphological, microstructural, dielectric and magnetic properties were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) analysis and impedance measurements. The data obtained demonstrated the influence of stoichiometry on the dimensional morphological variation, density, grain size, and electromagnetic behavior in the proposed frequency range. Electromagnetic analysis revealed electrical (e*) and magnetic (μ*) behaviors very similar to an almost linear decrease of the real and imaginary parts with the increase of frequency, with some oscillations in several parts of the curve, according to the different β. Thus, for the ferrites produced by the conventional ceramic method of powders oxides sintering, irrigated with partial oxygen pressure, within a determined thermal curve, we observed an important relationship between the different triphasic stoichiometric combinations of Mn-Zn-Cu, according to the different β, with their volume, density, grain size, and electromagnetic response in the frequency range from 1.0 MHz to 1GHz.
Highlights
Cu-Mn ferrites belong to a unique family of ferrites with specific importance due to their high magnetic permeability values and low losses at low frequencies[1]
While the sample with β = 0.40 differed from the others, presenting a lower value of 4.6135 g/ml. This is due to lower volumetric decrease that occurred in this sample, and to a substantially smaller grain size than the other samples
Cu was replaced by Zn, because in this stoichiometry the Cu element is in lower concentration than Zn (4.1% and 10.5% respectively)[24]
Summary
Cu-Mn ferrites belong to a unique family of ferrites with specific importance due to their high magnetic permeability values and low losses at low frequencies[1]. Spinel ferrites have been widely used in recent years due to their electromagnetic properties for this form of crystalline structure This type of ferrite has a general formula AFe2O4, where A is bivalent metal ion, e.g., Fe, Mg, Zn, Ni, Mn, Cu, etc. Manganese Ferrite - MnFe2O4 and mixed ferrites such as MnFe2O4; ZnFe2O4; and CuFe2O4 are recognized as having particular properties of high magnetic permeability (μ*) with high electrical impedance[1,5,10,11,12]. Considering that these quantities are complex in form: ε* = ε’+ jε’’ and μ* = μ’ + jμ’’,.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
