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Anomalous increase in nematic-isotropic transition temperature in dimer molecules induced by magnetic field

Salili, S. M.; Tamba, M. G.; Sprunt, S. N.; Welch, C.; Mehl, G. H.; Jákli, A.; Gleeson, J. T.

Authors

S. M. Salili

M. G. Tamba

S. N. Sprunt

C. Welch

A. Jákli

J. T. Gleeson



Abstract

We have determined the nematic-isotropic transition temperature as a function of applied magnetic field in three different thermotropic liquid crystalline dimers. These molecules are comprised of two rigid calamitic moieties joined end to end by flexible spacers with odd numbers of methylene groups. They show an unprecedented magnetic field enhancement of nematic order in that the transition temperature is increased by up to 15K when subjected to 22T magnetic field. The increase is conjectured to be caused by a magnetic field-induced decrease of the average bend angle in the aliphatic spacers connecting the rigid mesogenic units of the dimers.

Journal Article Type Article
Publication Date May 26, 2016
Journal Physical review letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 116
Issue 21-27 May
Article Number 217801
APA6 Citation Salili, S. M., Tamba, M. G., Sprunt, S. N., Welch, C., Mehl, G. H., Jákli, A., & Gleeson, J. T. (2016). Anomalous increase in nematic-isotropic transition temperature in dimer molecules induced by magnetic field. Physical review letters, 116(21-27 May), https://doi.org/10.1103/PhysRevLett.116.217801
DOI https://doi.org/10.1103/PhysRevLett.116.217801
Keywords Nematic liquid crystals; Dimer molecules
Publisher URL http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.217801
Additional Information Copy of article published in: Physical review letters, 2016, v.116

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