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Saturation of Spontaneous Polarization Charge in Pyroelectric Crystals of LiNbO3, LiTaO3 and CsNO3 at Low Temperature Above 4.2 K

Author:

James D. Brownridge and Sol Raboy

Subject Area:

Physical Sciences and Engineering

Abstract:

Experimental observations of the change in the polarization charge of pyroelectric crystals of LiNbO3, LiTaO3 and CsNO3, as the temperature of the crystal is changed from about 300K to a lower limit of 4.2K, are described. It was found that the rate of change of the polarization charge slowed down considerably and, perhaps, reached a zero rate of change. The onset of this “saturation” of the polarization charge occurred at low temperatures, above the temperature of liquid helium, which were different for each of the three types of crystal. This paper is in memory of Sol Raboy, Emeritus Professor of Physics, Binghamton University.

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