Dielectric Properties of Single Domain Crystals of BaTiO3at Microwave Frequencies

Abstract
Small-signal dielectric constant measurements were made on single domain crystals of BaTiO3 from 25°C to 170°C at 24 kMc/sec. A typical Curie behavior was observed with a dielectric constant ε11 of about half the dc value below the upper Curie point. Measurements of ε11 were also made with a dc field (E3) applied along the c axis in order to obtain information concerning the distortion of the potential well perpendicular to the c axis when the ion is displaced along the c axis. The change Δε11 observed was about 50 for an applied field of 104 volts/cm.