DIAMAGNETISM AND ORIENTATIONAL ORDER OF NEMATIC LIQUID CRYSTALS.

A. Buka, W. H. de Jeu

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Abstract

Measurements are presented for the diamagnetic anisotropy of thirteen nematic liquid crystals. As any bias in the rotation around the long molecular axis is most probably small, the results probe accurately the temperature variations of S, the degree of orientational order. The critical behavior of S near the nematic-isotropic phase transition can be described by an exponent beta of the order of 0. 25. Procedures are considered to obtain the molecular magnetic anisotropy. By a systematic variation of the structure of the molecules an impression of the contributions of the various molecular groups can be obtained. It turns out to be rather difficult to obtain accurate data for the molecular magnetic anisotropy. As a consequence the absolute scale of S can only be fixed with an accuracy of the order of 10%.

Original languageEnglish
Pages (from-to)361-367
Number of pages7
JournalJournal de physique Paris
Volume43
Issue number2
Publication statusPublished - Feb 1982

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Diamagnetism
Nematic liquid crystals
Magnetic anisotropy
Anisotropy
Phase transitions
Molecules
Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

DIAMAGNETISM AND ORIENTATIONAL ORDER OF NEMATIC LIQUID CRYSTALS. / Buka, A.; de Jeu, W. H.

In: Journal de physique Paris, Vol. 43, No. 2, 02.1982, p. 361-367.

Research output: Contribution to journalArticle

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