INVESTIGATIONS ON THE EXISTENCE OF A HIGH-TEMPERATURE PHASE-TRANSITION IN AMMONIUM-SULFATE CRYSTALS

被引：5
|
作者：
GAFFAR, MA
ELHALWANY, SM
MOHAMED, GA
ELMAGHRABY, MA
机构：
[1] Physics Department, Faculty of Science, Assiut University
来源：
PHYSICA B | 1994年 / 193卷 / 3-4期
关键词：
D O I：
10.1016/0921-4526(94)90039-6
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The existence of a high-temperature phase transition in ammonium sulphate (AS) crystals is discussed. The DC electrical conductivity and the dielectric permittivity in the temperature range K are measured and the results are examined trying to detect the proposed phase transition. The results indicate no evidence for a ferroelectric phase transition, but the anomaly observed at 423 K simply is the result of variations in the conduction mechanism which could be attributed to an order-disorder type of phase transition.
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页码：284 / 290
页数：7
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