Keywords : magnetic thin film
Advanced Materials Letters,
2013, Volume 4, Issue 1, Pages 74-77
Thin magnetic films have been formed on the surface of Fe 2+ , Fe 3+ and PVA solution applying NH3 vapors. The growth of films has been inferred via island growth mechanism. The film grown for shorter exposure time of NH3 is composed of islands in nanometer range, whereas the film grown for high exposure time of NH3 consists islands in micrometer range. For lower NH3 exposure, discrete islands are formed in polyvinyl alcohol (PVA) matrix which coalesces in bigger islands when exposed for larger time to NH3 vapor. Similarly, depending upon the NH3 exposure, nanoparticles inside films vary from 5 to 30 nm. The magnetization measurement shows that the films have thickness dependent saturation magnetization. For the thick film the saturation magnetic field is around 1400 Oe whereas for thin film it is 1000 Oe.