Structural aspects of the dielectric anomaly in SC(NH2)2 crystals at 161 K |
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| Authors: | B Sh Bagautdinov M S Novikova |
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| Institution: | (1) Institute of Solid-State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia;(2) Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 117333, Russia |
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| Abstract: | The residual incommensurate modulations in the ferroelectric phase of the SC(NH2)2 thiourea are investigated using single-crystal x-ray diffractometry. It is found that the structural states of the ferroelectric phase (T<169 K) depend on the thermal prehistory of the crystal in the temperature range of existence of the incommensurate phase (202-169 K). The dielectric anomaly observed at T x=161 K is justified structurally. |
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