Characterization BaFe12-3xCoxCuxZnxO19 Samples Based on Natural Iron Sand on Electrical and Magnetic Properties as a Microwave Absorbent Material

Indonesia is one of the countries that has very large natural resources, one of which is related to iron sand. Iron sand is a type of sand with a significant concentration of iron. This is usually characterized by dark gray or blackish color conditions. The purpose of this study was to determine the characteristics of the synthesis results of BaFe12-3xCoxCuxZnxO19 from natural iron sand. The natural iron sand obtained was synthesized using the cooperativity method because its advantages are that it has a variety of conditions that can be selected starting from the ratio, temperature, pH, precipitating agent, and so on. In accordance with the desired final result, namely to create a soft magnetic powder so that it can be used as a basic material for microwave absorption with a high conductivity level of nanoparticle size. Economical basic materials can be used as an alternative in making samples. The results of the synthesis that have been carried out have succeeded in obtaining dark colored powder according to the variations in concentration and temperature carried out, and then the results of the characterization test were carried out to determine the absorption produced with the Vector Network Analyzer (VNA) tool, where the results obtained were quite high, namely 99.31%. This is because the sample is included in the semiconductor material, which is characterized by the conductivity value obtained ranging from 10-3 S/cm to 10-1 S/cm. According to the indicators, the sample has met the criteria to be applied as a microwave absorber material, namely having a nanoparticle size, being soft magnetic, and already being included in the semiconductor material.