Static and dynamic dielectric effects in the vicinity of the isotropic to nematic phase transition in 7CB
作者： M. Ginovska , G. Czechowski , J.‐L. Déjardin , J. Jadżyn , L. Hellemans
DOI: 10.1080/02678290500116946
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摘要: Static and dynamic dielectric measurements were performed with very high accuracy on a mesogenic compound n‐heptylcyanobiphenyl (7CB) in the isotropic (I) nematic (N) phases. The critical‐like temperature behaviour of static permittivity 7CB vicinity I–N phase transition can be described critical exponent close to 0.5, indicating tricritical nature transition. Anomalously slow rotational diffusion (subdiffusion), characterized by fractal value α, is observed lambda‐like profile dependence.
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