High Pressure Synthesis, Lattice Distortion, and Dielectric Properties of a Perovskite Bi(Ni 1/2 Ti 1/2 )O 3

摘要: A perovskite Bi(Ni 1/2 Ti )O 3 was successfully synthesized under high pressure 6 GPa. This compound has orthorhombic cell with the parameters, a = 2 m sin( g /2) 0.5626(2) nm, b 4 1.5681(6) and c cos( 0.5548(2) nm containing eight monoclinic primitive unit 0.39507(7) 0.39203(15), 90.80(2)°, lattice distortion is expected to be antiferroelectric. In addition, sudden increase in dielectric constant accompanied by anomaly of loss observed at 490 K as temperature increases. though correspond transition from antiferroelectric phase another one.