MAGNETIC PROPERTIES OF MAGNESIUM ? DOPED BISMUTH FERRITE AS MULTIFERROIC MATERIAL PRODUCED BY SOL GEL METHOD AT LOW TEMPERATURE

The multiferroic properties of the material would be better if the material has good magnetic properties as well. Bismuth ferrite (BiFeO3) is one of multiferroic material group, but it is difficult to produce BiFeO3 as multiferroic material because it occurs leakage of current arising from non stoichiometric. So to minimize it, it has already been engineering processed to synthesis BiFeO3 doped by Mg to produce Bi0.9Mg0.1FeO3 and Mg0.93Mg0.07FeO3. Engineering process performed by sol-gel method. Characterization of the powder is modified done by using TGA / DTA test, X-Ray Diffraction (XRD) test and magnetic properties (Vibrating Sample Magnetometer) test. From the results of TGA / DTA test, it could be seen that the calcination process could be performed at temperatures of 150 and 175oC and sintering process could be carried out at a temperature of 650oC. From the result of XRD test, it is shown that the powder of Bi0.9Mg0.1FeO3 has the least amount of impurities with total oxide of 6.9% (bismite 3.5% and silenite 3.4%) at calcination temperature of 175oC for 4 hours and sintering at 650oC for 6 hours. The powder has higher value of magnetic polarization saturation than Bi0.93Mg0.07FeO3 with the value of magnetic polarization saturation of 4.38 emu/gram, while the value of magnetic polarization saturation for Bi0.93Mg0.07FeO3 is 2.76 emu/gram.