Fabrication and magnetic properties of Fe-In₂O₂ nanometric composite granular films

Nanometric ferromagnetic metal particles-semiconductor matrix Fe-In₂O₃ composite granular films are fabricated by the radio frequency sputtering. The laws of the magnetic properties of granular films varying with the lattice structure have been studied. The result shows that the dimension of the nanometer Fe particles in Fe-In₂O₃ granular films can be changed by annealing in vacuum. The specific saturation magnetization (σ_s) of the granular films decreases with the decrease of particle dimension. The peak occurs in the dependence of the coercivity (H_c) on Fe particles dimension, which displays the critical property of the magnetic single domain particle.