PL EN


Preferences help
enabled [disable] Abstract
Number of results
2012 | 121 | 5-6 | 1276-1278
Article title

Magnetic Field Induced Structural Transitions in 6CHBT-Based Ferronematics

Content
Title variants
Languages of publication
EN
Abstracts
EN
Ferronematics are stable colloidal suspensions of magnetic particles in nematic liquid crystals. The presence of the magnetic particles enhances the magnetic susceptibility of ferronematics, in comparison with pure liquid crystals. In this work the thermotropic liquid crystal 4-(trans-4'-n-hexylcyclohexyl)-isothiocyanato-benzene (6CHBT) and 6CHBT dissolved in phenyl isothiocyanate were doped with spherical magnetic nanoparticles with aim to increase the sensitivity of the liquid crystal on an external magnetic field. The volume concentration of the magnetic particles was 5 × 10^{-4}. The phase transition temperature from isotropic to nematic phase in the external magnetic field up to 12 T was monitored by precise capacitance measurements in the capacitance cells filled with nematic sample as well as with the prepared ferronematic sample. There was no observable shift in the transition temperature in the case of pure 6CHBT, 6CHBT doped with spherical particles and 6CHBT dissolved in phenyl isothiocyanate while in the case of 6CHBT dissolved in phenyl isothiocyanate doped with spherical magnetic particles the shift in the temperature about 9C of the phase transition from isotropic to droplet state at the external magnetic field 12 T was observed.
Keywords
EN
Contributors
  • Institute of Experimental Physics, Slovak Academy of Science, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Experimental Physics, Slovak Academy of Science, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Experimental Physics, Slovak Academy of Science, Watsonova 47, 040 01 Košice, Slovakia
  • Institute of Experimental Physics, Slovak Academy of Science, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
author
  • High Magnetic Field Laboratory, CNRS, 25 Avenue des Martyrs, Grenoble, France
author
  • High Magnetic Field Laboratory, CNRS, 25 Avenue des Martyrs, Grenoble, France
  • Institute of Experimental Physics, Slovak Academy of Science, Watsonova 47, 040 01 Košice, Slovakia
References
  • 1. L.J. Martínez-Miranda, K. McCarthy, J.J. Harry, A. Noel, Appl. Phys. Lett. 89, 161917 (2006)
  • 2. O. Buluy, S. Nepijko, V. Reshetnyak, E. Ouskova, V. Zadorozhnii, A. Leonhardt, M. Ritschel, G. Schonhense, Y. Reznikov, Soft Matter 7, 644 (2011)
  • 3. P. Kopčanský, N. Tomašovičová, M. Koneracká, V. Závišová, M. Timko, A. Džarová, A. Šprincová, N. Éber, K. Fodor-Csorba, T. Tóth-Katona, A. Vajda, J. Jadzyn, Phys. Rev. E 78, 011702 (2008)
  • 4. N. Tomašovičová, P. Kopčanský, M. Koneracká, L. Tomčo, V. Závišová, M. Timko, N. Éber, K. Fodor-Csorba, T. Tóth-Katona, A. Vajda, J. Jadzyn, J. Phys. Condens Matter 20, 204123 (2008)
  • 5. P. Kopčanský, N. Tomašovičová, M. Koneracká, M. Timko, Z. Mitróová, V. Závišová, N. Éber, K. Fodor-Csorba, T. Tóth-Katona, A. Vajda, J. Jadzyn, E. Beaugnon, X. Chaud, Acta Phys. Pol. A 118, 988 (2010)
  • 6. W. Helfrich, Phys. Rev. Lett. 24, 201 (1970)
  • 7. I. Lelidis, G. Durand, Phys. Rev. E 48, 3822 (1993)
  • 8. H. Stanley, Introduction to Phase Transitions and Critical Phenomena, Oxford Science, New York 1971
  • 9. C. Rosenblatt, Phys. Rev. A 24, 2236 (1981)
  • 10. T. Ostapenko, D.B. Wiant, S.N. Sprunt, A. Jákli, J.T. Gleeson, Phys. Rev. Lett. 101, 247801 (2008)
  • 11. R. Dabrowski, J. Dziaduszek, T. Szczucinski, Mol. Cryst. Liq. Cryst. Lett. 102, 155 (1984)
  • 12. P. Kopčanský, M. Koneracká, M. Timko, Potočová, L. Tomčo, N. Tomašovičová, V. Závišová, J. Jadzyn, J. Magn. Magn. Mater. 300, 75 (2006)
  • 13. P. Kedziora, J. Jadzyn, L. Hellemans, Phys. Rev. E 66, 021709 (2002)
  • 14. S.V. Burylov, Y.L. Raikher, J. Phys. Lett. A 149, 279 (1990)
  • 15. S.V. Burylov, Y.L. Raikher, J. Magn. Magn. Mater. 122, 62 (1993)
  • 16. S.V. Burylov, Y.L. Raikher, Mol. Cryst. Liq. Cryst. 255, 107 (1995)
  • 17. P. Kopčanský, N. Tomašovičová, M. Koneracká, V. Závišová, M. Timko, L. Tomčo, N. Éber, K. Fodor-Csorba, T. Tóth-Katona, A. Vajda, J. Jadzyn, E. Beaugnon, X. Chaud, Phys. Procedia 9, 82 (2010)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv121n5-6p88kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.