Fe2O3film (∼110 A˚) on crystalline Al2O3substrate is treated by ruby laser pulses at different energy densities up to a maximum of ∼7.5 J/cm2, and the transformations are examined by conversion electron Mo¨ssbauer spectroscopy and small‐angle x‐ray diffraction measurements. It is observed that transformations begin to appear in the sample at an energy density of ∼3.0 J/cm2although significant modifications are observed only at energy densities higher than about 7.0 J/cm2. The values of hyperfine interaction parameters reveal that the laser treated samples contain FeAlO3and FeAl2O4phases, along with the residual &agr;‐Fe2O3phase. The laser‐mixed state undergoes structural modifications upon thermal annealing, leading to formation of the Fe3O4phase and complete disappearance of the FeAlO3phase.