Perovskite Formation of Pb(Mg_<1/3>Nb_<2/3>)O_3 and Pb(Fe_<1/2>Nb_<1/2>)O_3 Film by Sol-Gel Method

概要

論文の詳細を見る
Dielectric thin films of Pb(Mg_<1/3>Nb_<2/3>)O_3 and Pb(Fe_<1/2>Nb_<1/2>)O_3 were prepared by sol-gel method. The Pb(Mg_<1/3>Nb_<2/3>)O_3 perovskite film was formed by heat treatment at over 600℃ and oriented on substrates whose interplanar spacings were close to that for the perovskite. On the other hand, Pb(Fe_<1/2>Nb_<1/2>)O_3 perovskite appeared at below 500℃. It was not oriented in spite of having almost the same lattice parameters. Transmission electron microscopy revealed that Pb(Mg_<1/3>Nb_<2/3>)O_3 perovskite nucleation occurs at specific places on the substrate, while Pb(Fe_<1/2>Nb_<1/2>)O_3 occurs randomly in the film. The grain of these films grew larger than 0.1 μm, and the dielectric constant was 1800 for the PMN film.
社団法人応用物理学会の論文
1990-06-20