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Experiment in critical phenomena at phase transitions in liquid crystals

 

作者: A. J. Nicastro,  

 

期刊: American Journal of Physics  （AIP Available online 1984）
卷期: Volume 52, issue 10  

页码: 912-915

 

ISSN:0002-9505

 

年代: 1984

 

DOI:10.1119/1.13793

 

出版商: American Association of Physics Teachers

 

关键词: liquid crystals;bench−scale experiments;birefringence;temperature dependence;crystal−phase transformations;critical exponents;mean−field theory;electro−optical effects

 

数据来源: AIP

 

摘要:

A simple electro‐optical experiment is described that allows advanced undergraduates to measure the critical exponent γ. The experiment investigates the electric‐field‐induced birefringence as a function of temperature at the nematic‐isotropic phase transition in liquid crystals. The classical mean‐field result that γ=1 is verified.

 

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