Dielectric properties of NH2 (CH3)(2)AL(SO4)(2)center dot 6H(2)O crystals at low temperatures

被引：23
|
作者：
Kapustianik, V. [1 ]
Bublyk, M.
Polovinko, I.
Sveleba, S.
Trybula, Z.
Andreyev, E.
机构：
[1] Lviv Univ, Dept Phys, UA-290005 Lvov, Ukraine
[2] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland
[3] Minsk Radiotech Inst, Minsk 220012, BELARUS
来源：
PHASE TRANSITIONS | 1994年 / 49卷 / 04期
关键词：
dielectric permittivity; dispersion; phase transition; ferroelectric phase; DMAAS;
D O I：
10.1080/01411599408201175
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The dielectric permittivity epsilon' and dielectric loss tg delta of NH2(CH3)(2)AL(SO4)(2) center dot 6H(2)O (DMAAS) crystals were measured in the low-temperature range at different frequencies of the measuring electric field. The existence of a transition to the ferroelectric phase (T-C = 152 K) was confirmed. in addition, anomalies of both dielectric parameters, characteristic of the phase transition were also observed at T-1 = 107 K (on heating) and T-2 = 75 K. It has been found that DMAAS crystals possess a considerable dispersion of e' and tg delta in the temperature range of the ferroelectric phase.
引用
收藏
页码：231 / 235
页数：5
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