AN AC CALORIMETER FOR MEASURING HEAT-CAPACITY OF FREESTANDING LIQUID-CRYSTAL FILMS

被引：53
作者：
GEER, R
STOEBE, T
PITCHFORD, T
HUANG, CC
机构：
[1] School of Physics and Astronomy, University of Minnesota, Minneapolis
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 1991年 / 62卷 / 02期
关键词：
D O I：
10.1063/1.1142136
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A unique ac calorimeter for measuring the heat capacity of free-standing liquid-crystal films has been developed. A theory of the measurement method used is presented and the experimental setup is discussed. The calorimeter has been used to study the nature of the smectic-A-hexatic-B transition of several liquid-crystal compounds. The evolution of the heat-capacity anomaly associated with this transition has been studied for films ranging from three to a few thousand smectic layers in thickness.
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页码：415 / 421
页数：7
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