Synthesis and Magnetic Properties of Ferrite Films Prepared Using the Co-Precipitation Technique

Abstract

Nanoparticle films of ferrite were synthesized using the chemical co-precipitation technique. It was shown that densely packed ferrite films with a thickness of 7 mu m can be deposited from fine particles with an average particle size of 10-20 nm on the Si substrate. The particle size, composition, and magnetic properties of the films are affected by the pH value of the reactive solutions. For samples with a lower pH value, the particles are small and agglomerate together. Conversely, for samples with a higher pH value, the particles are large and uniformly distributed. Samples fabricated with a higher pH value show large values of magnetization and lower values of coercive force. The result of larger magnetization relates to larger particle size and a more uniform distribution for samples fabricated with a higher pH value.