磁気光学導波路用材料(YNd)₃Fe₅O₁₂膜のLPE成長

抄録

(YNd)₃Fe₅O₁₂ films with in-plane magnetization for magnetooptical waveguides were grown by liquid phase epitaxy. Precise control of lattice mismatch which is necessary for phase matching between TE and TM modes was achieved by utilizing temperature and growth rate dependences of Pb ions incorporation into the film from PbO in the melt. Small amount of Nd³⁺ ion substitution (2 mole %) was sufficient for obtaining the film with in-plane magnetization. High power conversion ratio (79%) was obtained. It was found that the growth temperature change of the observed birefringence is several times larger than that calculated from the lattice mismatch and the magnitude of the birefringence can be reduced by thermal annealing.