Аннотация: Dielectric, piezoelectric and elastic properties of NH4HSeO4 crystal were studied in temperature range 180–300 K. Some anomalies of the properties near Tc=250 K and Ti=261 K were found. These anomalies are caused by high dielectric permeability along b-axis above Ti and the symmetry-forbidden piezoelectric coupling. An effort of phenomenological description of the successive phase transitions is made.
WOS
Доп.точки доступа:
Krasikov, V. S.; Zaitseva, M. P.; Зайцева, Мария Пантелеймоновна; Shabanova, L. A.; Шабанова Л. А.; Zrazhevsky, V. M.; Zherebtsova, L. I.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич