Dielectric Properties of Di-n-Heptyl Azoxybenzene in the Nematic and in the Smectic-APhases

Dielectric Properties of Di-n-Heptyl Azoxybenzene in the Nematic and in the Smectic-APhases
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二正庚基氧化苯在向列相和近晶相中的介电性能

DOI:
10.1103/physrevlett.32.40
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发表时间:
1974
影响因子:
8.6
通讯作者:
P. Bordewijk
P. Bordewijk
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
W. H. Jeu;T. Lathouwers;P. Bordewijk

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本文报道了对,对′-二正庚基氧化偶氮苯在α-相和近晶A相中的介电常数。在向列相-近晶相转变附近,ε ε_(max)随温度的降低而减小,而ε_(max)随温度的升高而增大。这是由近晶面的形成引起的分子之间的偶极相关性增加来解释的。
We report the dielectric constants of p, p′-di-n-heptyl azoxybenzene in the nematic and in the smectic-A phase. Around the nematic-smectic transition ε∥ decreases with decreasing temperature while ε⊥ increases anomalously. This is explained by an increased dipolar correlation between the molecules due to the formation of the smectic planes.