Spray deposition of nanocrystalline Ni1-x Znx Fe2 O4 (x≤0.6) films from polyol-mediated sol: Microstructure and magnetic properties

Static-spray deposition of a polyol-based sol, containing nanoparticles of NiZn ferrite, on a moderately heated glass support, has been used to generate crystalline thin films. The films exhibit superparamagnetic behavior with a blocking temperature, which decreases as the zinc content increases, due to their nanocrystalline character. At low temperature, the films are ferrimagnetic; the saturation magnetization and the coercivity depend markedly on both the zinc content and the microstructure. © 2008 American Institute of Physics.