Ferroelectricity in Li₂B₄O₇ single crystal

Abstract

It has been found that Li₂B₄O₇ crystal shows ferroelectric activity in the c-direction in the temperature range from room temperature to 100°C. The values of spontaneous polarization and coercive field at 25°C estimated from the shown D–E hysteresis loop are 1.44 μC/cm² and 2.5 kV/cm, respectively. With increasing temperature above 100°C, the ferroelectric hysteresis loop was reduced into a line-shape with high conducting behavior. The reason is believed that a high ionic conductivity of Li₂B₄O₇ make a sample into a leak capacitor.

Key Words:

• Li₂B₄O₇
• Ferroelectric
• Hysteresis loop
• Ionic Conduction