The effect of polarization frequency and temperature on polarization rule of tourmaline

ABSTRACT In order to understand the effect of polarization frequency and temperature on polarization rule of tourmaline, the ferroelectric hysteresis loops of three kinds of tourmaline samples are measured in different polarization conditions. It is demonstrated that the spontaneous polarization along c-axis of tourmaline is larger than that perpendicular to c-axis. Furthermore, the polarization frequency and temperature have great influences on the ferroelectric hysteresis loop of tourmaline, inferring that the polarization forms of tourmaline may be composed of turning-direction polarization of electric dipole and thermionic relaxation polarization.

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