ビスマス鉄ガーネット薄膜の組成比と磁気光学特性 : 磁気光学・光磁気記録

概要

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Nonthermodynamical Bi_3Fe_5O_<12> films were synthesized by the reactive ion beam sputtering technique, and the relation of the compositions of the starting materials 3(1+x) × Bi_2O_3 + 5 × Fe_2O_3 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 θ_F value. From the point of view of the magneto-optical properties, the optimized compositions of the film may deviate from the stoichiometric compositions.
社団法人日本磁気学会の論文
2002-04-01