Dielectric and Pyroelectric Studies on [N(CH3)4]3Bi2X9 (X = Cl, Br) |
| R. Jakubas, G. Bator Institute of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383 Wrocław, Poland and J. Mróz Institute of Physics, Technical University of Wrocław, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland |
| Received: September 27, 1994 |
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| Dielectric properties of [N(CH3)4]3Bi2X9 (X = Cl, Br) single crystals were measured in the frequency range 1 kHz - 1 MHz in the vicinity of structural phase transitions of first-order type at 152 K (Cl) and 183 K (Br). The pyroelectric effect was observed in [N(CH3)4]3Bi2[N(CH3)4]3Bi2Cl9 at structural phase transition (Tc = 152 K) with the ΔPs of the order of 10-5 C m-2. Polarized microscope observations show appearance of ferroelectric domain structure in [N(CH3)4]3Bi2Br9 within the low temperature phase. |
| DOI: 10.12693/APhysPolA.87.663 PACS numbers: 77.70.+a, 77.80.Bh, 77.80.Dj |