Growth and Dielectric Properties of 0.48 Pb(Fe_1/2Nb_1/2)O₃–0.52 PbTiO₃ Single Crystal

Abstract

Large ferroelectric single crystals of 0.48 Pb(Fe 1/2 Nb 1/2 )O 3 –0.52 PbTiO 3 solid solution system were first successfully grown using a modified Bridgman technique and their properties were investigated. The obtained crystals were about 25 mm in diameter, 100 mm in length and black in color. The crystal exhibited abnormal dielectric properties that the dielectric constant was as high as 30000 and the dielectric loss factor was about 0.5 at room temperature. The mechanism of this phenomenon was discussed.