Dielectric Properties of Single Domain Crystals of BaTi $O_{3}$ at Microwave Frequencies

Small-signal dielectric constant measurements were made on single domain crystals of BaTi

O_{3}

from 25°C to 170°C at 24 kMc/sec. A typical Curie behavior was observed with a dielectric constant

ε_{11}

of about half the dc value below the upper Curie point. Measurements of

ε_{11}

were also made with a dc field (

E_{3}

) 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

Δ ε_{11}

observed was about 50 for an applied field of

10^{4}

volts/cm.

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Dielectric Properties of Single Domain Crystals of BaTiO3at Microwave Frequencies