Ferroelectricity and phase transition from incommensurate phase into commensurate one in (NH4)2ZnCl4 |
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| Authors: | IA Belobrova AK Moskalev NV Bizukina SV Milul IP Aleksandrova |
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| Institution: | L.V. Kirensky Institute of Physics, 660036 Krasnoyarsk, USSR |
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| Abstract: | Phase transition has been found in (NH4)2ZnCl4 at T = 266 ± 0.5 K by NQR method. There is a ferroelectric phase below Tc with a space group P21cn and with the trebling of the elementary lattice parameter along the axis c. Above the phase transition temperature in the crystal (NH4)2ZnCl4 an incommensurate phase is realized. |
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