Abstract
Nonthermodynamical Bi3Fe5O12 films were synthesized by the reactive ion beam sputtering technique, and the relation of the compositions of the starting materials 3(1+x)×Bi2O3 + 5 ×Fe2O3 powder, targets, and sputtered films was investigated. The compositions of the target and the film were different from that of the starting materials, which can be understood by taking the high volatility and high sputtering yield of Bi into consideration. By using a starting material with x = 0.15, BIG film with the composition Bi:Fe:O = 3.0:5.0:12.0 was successfully obtained. However, a film with x = 0.1 showed the largest θF value. From the point of view of the magneto-optical properties, the optimized compositions of the film may deviate form the stoichiometric compositions.
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