Journal
PHYSICAL REVIEW E
Volume 78, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.78.050701
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Funding
- Ministry of Education, Culture, Science, Sports and Technology of Japan [16105003]
- DST, Government of India [SR/FTP/PS-48/2006]
- Grants-in-Aid for Scientific Research [16105003] Funding Source: KAKEN
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We report the determination of the Kerr constant (B) and the real part of the third-order nonlinear optic susceptibility (chi((3))) above the nematic-isotropic phase transition temperature (T-NI) of a liquid crystal composed of bent-shaped molecules. The values of B and chi((3)) just above (similar to 0.3 degrees C) T-NI are similar to 8x10(-12) m/V-2 and 5x10(-20) m(2)/V-2, respectively. The estimated critical temperature T-C(*) is about 1.5 degrees C below T-NI indicating that the nematic-isotropic (NI) transition is weakly first order as in the case of calamitic liquid crystals. The temperature-dependent Kerr constant is found to be in good agreement with the predictions of the Landau-de Gennes theory. The experimental results are compared with those in a calamitic liquid crystal material with negative dielectric anisotropy in the nematic phase.
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