J. Phys. Soc. Jpn. 46 (1979) pp. 561-565 |Next Article| |Table of Contents|
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(Received May 15, 1978)
Pyroelectric and dielectric measurements have been made on Rb2Cd2(SO4)3 crystals with the simultaneous optical examination of the domain texture of the specimens. An unusual temperature dependence of the spontaneous polarization was found in the ferroelectric phases, which is similar to that found in (NH4)2SO4. As the temperature is lowered, the spontaneous polarization appears at the Curie point (-144^°C), gradually decreases and changes its sign below -160^°C without an appreciable change at the second transition temperature of -170^°C. The reversal in polarization was confirmed to take place by both pyroelectric measurement and optical observation. An abrupt change of dielectric constant εb at the Curie point was revealed by using single domain specimens. ©1979 The Physical Society of Japan
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DOI: 10.1143/JPSJ.46.561