The study of barium ferrite thick films prepared by electron beam evaporation

In this paper, we present the results obtained on thick layers (≈ 12 μm) of barium ferrite. Those are prepared by electron beam evaporation, under oxygen and at a substrate temperature of 700°C. We then looked at the influence of the deposition rate and post deposition annealing on the magnetic, crystallographic and morphologic properties of the layers. Before annealing the layers are crystallized according to the phase of the bulk ferrite and present good magnetic properties. Moreover starting from one certain deposition rate (Vd ≈ 10 μm/h) the annealing modifies the composition of the layers and increases the value of the coercive field.