Abstract
Magnetically induced optical birefringence in the isotropic liquid crystal phase was used to study binary mixtures of pentylcyanobiphenyl (5CB) and two quasispherical impurities: carbon tetrachloride and tetraethyltin. For solute mole fraction concentrations 0≤X≤0.7, both the nematic orientational susceptibility dS/dH2 vs temperature and the supercooling limit T* were obtained vs X. It was found that both quantitites differ from existing theories for the 5CB/tetraethyltine mixtures, probably requiring the inclusion of short range correlations in the various models.
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