An evaluation on the possibility of a Cd-Co ferrite for high frequency operation

Abstract

Synthetic ferrites have been developed and engineered to contain specific magnetic and electrical properties such as: high resistivity, high saturation magnetization, low thermal conductivity in a wide variety of applications.
The properties of synthetic ferrites are determined by the choice of the cations and their distribution in the various sites ofthe spinel structure. A review of literature has shown that the most studied spinel ferrites are of the Ni-Zn, Mn-Zn and Zn-Co types. This study aims to investigate the properties of the Cd-Co system, which will utilize cadmium in place of zinc of the spinel ferrite structure. Although Cd and Zn belong to the same family, there is no available record of studies of the Cd-Co ferrite system. Cadmium is better than zinc due to its bigger atomic size which makes its forces of attraction weaker, thus, more reactive. It is also an effective non-covalent former between ions of transition elements because of its completely-filled outermost shell.
Specifically, the role of Cd as a replacement for Zn in the spinel ferrite structure is evaluated. The characteristic electric and magnetic properties of the Cd-Co system are correlated with that of Zn-Co system. The possible products of Cd-Co ferrite system for high frequency applications are: high level inductor, component for a microwave circuits, gapped core, and a high level or power transformer.