The Influence of Li+ and K+ Added Cations and Annealing Temperature on the Magnetic and Dielectric Properties of Mg-Zn Ferrite

Abstract

This paper presents the results of an investigation on the magnetic and dielectric properties of Mg0.5Zn0.5Fe2O4 spinel ferrite with a 1% weight percentage of Li+ and K+ added cations. The addition of metal ions plays an important role in increasing the porosity and favors the formation of ferrite at low temperatures. The goal of this new research is to demonstrate that by selecting the type of metallic cations for addition or choosing an optimal sintering temperature, it may be possible to improve the magnetic and electrical properties of Mg-Zn ferrite. The samples were prepared using sol-gel self-combustion techniques and annealed at 1000°C, 1100°C, and 1200°C. Scanning electron microscopy revealed the shape and grain size of the samples, and the phase composition was analyzed using the X-Ray diffraction technique. The magnetic information, such as remanent magnetization MR, saturation magnetization MS, and coercivity HC, were extracted from the hysteresis loops of the samples. The electrical investigation was focused on the low- and high-frequency dependence of dielectric constant and dielectric losses. The results are discussed in terms of microstructural changes induced by the additions of Li+ and K+ metallic cations. Conclusions are drawn concerning the optimization of magnetic and electrical properties for the development of Mg-Zn ferrite with possible applications in the field of magnetic materials or electronics.

Influence of potassium doping on the structural, conduction mechanism, and dielectric properties of CaFe2O4

“…Alkaline metals are very reactive, releasing a single electron on the last layer to other metals in the ferrite composition. 20 Incorporating metal cations into the ferrite structure can notably enhance the conduction mechanism, optical characteristics, or magnetic properties of semiconductors. [21][22][23] In the current investigation, the focus was on exploring the characteristics of K-doped CaFe 2 O 4 (KCaFe 2 O 4 ) mixed ferrite.…”

Annealing Temperature Effects on Humidity Sensor Properties for Mg0.5W0.5Fe2O4 Spinel Ferrite

“…This class of ferrite presents a particularly attractive set of properties: high Curie temperature, high electrical permittivity and resistivity and good chemical stability. Different addition to or substitution ratios with metal ions in the magnesium spinel ferrite stoichiometric composition can make essential contributions to the conduction mechanism, optical or magnetic properties of this semiconductor [ 19 , 20 , 21 , 22 , 23 ]. The main inconveniences for the synthesis of Mg-based ferrites are the high sintering temperature (over 850 °C) and longer time treatment, which result in significant power consumption and material loss [ 24 ].…”