Optical, resonant X-ray scattering, and calorimetric investigations of two liquid crystal compounds exhibiting the SmA-SmCα*-SmC* transitions
Titel:
Optical, resonant X-ray scattering, and calorimetric investigations of two liquid crystal compounds exhibiting the SmA-SmCα*-SmC* transitions
Auteur:
Huang, C. C. Liu, Z. Q. Cady, A. Pindak, R. Caliebe, W. Barois, P. Nguyen, H. T. Ema, K. Takekoshi, K. Yao, H.
Verschenen in:
Liquid crystals
Paginering:
Jaargang 31 (2004) nr. 1 pagina's 127-135
Jaar:
2004-01
Inhoud:
Three experimental measurements have been conducted to investigate the nature of the SmA-SmCα*-SmC* phase transitions of two liquid crystal compounds. The SmA-SmCα* transition shows a continuous transition with XY-like critical exponents. The SmCα*-SmC* transition displays a rapid variation of the incommensurate helical pitch. One of the compounds shows a small jump in the helical pitch, which signals a first order transition and is consistent with high resolution calorimetric results.