Synthesis and Magneto-Optical Properties of Bi₃(FeGa)₅O₁₂ on Glass Substrate Prepared by MOD Technique

Abstract

In order to apply for the magneto-optical (MO) imaging sensor, the preparation method of Bi₃(FeGa)₅O₁₂ (BIGG) films on glass substrate using metal organic decomposition (MOD) was investigated. Generally, the BIGG system is thermally non-equilibrium and not precipitated from direct annealing treatments on glass substrates. It became possible to crystallize on glass substrate by inserting garnet buffer layer. The (YBi)₃Fe₅O₁₂ was directly crystallized on glass substrate as polycrystalline buffer layer by annealing treatment. Then, the precursor BIGG films were coated on the buffer layer, then, they were crystallized by annealing treatment. The magneto-optical properties of the BIGG film were inferior to that on the Gd₃Ga₅O₁₂ single crystal substrate, however, these results indicate the possibility to prepare the magnetic garnet film with huge MO effect without single crystal substrate.