Growth and Characterization of Liquid-Phase Epitaxial Bi-Substituted Iron Garnet Films for Magneto-Optic Application

概要

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The effects of the chemical species of host rate-earth ions, melt compositions and growth orientations on the Bi-substitution level and magneto-optic properties of Bi-substituted garnet films grown by liquid-phase epitaxy were examined. For Gd^<3+> ions, a higher level of Bi substitution was attained than for Y^<3+> or Lu^<3+> ions, when garnet films were grown under the same growth conditions. A maximum Faraday rotation coefficient of -2880°/cm at 1.30 μm was observed in the (GdBi)_3(FeA1Ga)_5O_<12> film with a Bi-substitution level of 1.56 moles per garnet formula unit. The optical absorption coefficient was as small as 1.6 cm^<-1> in the (GdBi)_3(FeAlGa)_5O_<12> film with a Faraday rotation coefficient of -1800°/cm;consequently, a figure of merit of 267°/dB was attained at 1.30 μm.
社団法人応用物理学会の論文
1985-10-20