Abstract
La 0.67Ca 0.33MnO 3 thin films of different thicknesses have been studied by high frequency–high magnetic field ESR. The thinner one (150 nm) presents one single ESR line revealing a good homogeneity. We have determined its gyromagnetic tensor, which presents a slight anisotropy as regards the film plane: g ∥=1.97 and g ⊥=1.99. These values are in agreement with spin–orbit coupling. The magnetic anisotropy is uniaxial, within the film plane. The anisotropy field at low temperature is 0.07 T, a magnitude comparable to that observed in bulk compounds.
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