The A-C-A phase diagram of mixed liquid crystals: A photon transmission study

Haluk Özbek, Sevtap Yildiz, Önder Pekcan*, A. Nihat Berker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Ultraviolet/visible photon transmission technique was applied to study the phase diagram of the BOPDOB-BOPOOB liquid crystal system. It was observed that the nematic-smectic A transition becomes first order, as the weight percentage of BOPDOB in the binary mixture is increased. The smectic A-C-A reentrance disappears when the BOPDOB percentage approaches 100 (pure BOPDOB). We also present the smectic A-C transition temperatures and the critical exponents β of the all samples. The values of the exponent are consistent with mean-field theory.

Original languageEnglish
Pages (from-to)2161-2167
Number of pages7
JournalInternational Journal of Modern Physics B
Issue number15
Publication statusPublished - 20 Jun 2001


We thank Professor A. Nesrullayev for supplying us with the liquid crystal material. The Perkin Elmer Lambda 2 UV/VIS spectrometer was kindly donated by Alexander Von Humboldt Foundation. This work was supported by the Research Fund of Istanbul Technical University, Grant No: 1426 and 1538.

FundersFunder number
Istanbul Teknik Üniversitesi1426, 1538


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