Mechanosynthesis of Gadolinium Iron Garnet

We investigated the mechanosynthesis of gadolinium iron garnet by high‐energy ball milling stoichiometry amounts of α‐Fe 2 O 3 and Gd 2 O 3 , followed by short thermal annealings conducted at moderate temperatures. X‐ray diffraction and Mössbauer spectroscopy results revealed, for the as‐milled samples, the formation of the GdFeO 3 perovskite phase, in relative amounts that depend on the milling time. The formation of the Gd 3 Fe 5 O 12 garnet phase was observed in 1000°C/2 h or 1100°C/3 h as‐annealed samples. The occurrence of a milling time was verified in which the relative amount of garnet phase formed by further annealing is maximized.