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DIFFRACTION AND MAGNETIZATION PROPERTIES OF Fe3O4 NANOPARTICLE FROM NATURAL IRON SAND IN VARIOUS STIRRING RATE FOR POTENTIAL BIOMEDICAL APPLICATIONS

This study aims to determine the effect of synthetic stirring rate on the diffraction and magnetization properties of Fe3O4 nanoparticles. Materials made from natural iron sand were synthesized using the co-precipitation method with variations in stirring rate 270 to 470 rpm. At stirring up to 370 rpm (R3), the crystalline size of Fe3O4 decreases. Increasing the stirring rate caused the lattice parameters to decrease in the range of 8.3 Ao and the X-ray density to increase in the range of 5.0 g cm-3. The structure formed indicates that the sample contains 100% magnetite nanoparticles without any contaminants. The magnetite nanoparticles in this experiment with the smallest crystal size of 4.156 nm and the Ms value of 20.67 emu g-1 with a Hc value close to zero superparamagnetic, have the potential for future biomedical applications.