| Numéro |
J. Phys. IV France
Volume 07, Numéro C1, Mars 1997
7th INTERNATIONAL CONFERENCE ON FERRITES
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|---|---|---|
| Page(s) | C1-565 - C1-566 | |
| DOI | https://doi.org/10.1051/jp4:19971234 | |
7th INTERNATIONAL CONFERENCE ON FERRITES
J. Phys. IV France 07 (1997) C1-565-C1-566
DOI: 10.1051/jp4:19971234
1 Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53 Kosice, Slovak Republic
2 Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 1 7, Poznan, Poland
© EDP Sciences 1997
J. Phys. IV France 07 (1997) C1-565-C1-566
DOI: 10.1051/jp4:19971234
Study of Magnetic Fredericksz Transition in Ferronematics. Liquid Crystals Doped with Fine Magnetic Particles
P. Kopcansky1, M. Koneracka1, V. Zavisova1, J. Jadzyn2, G. Czechowski2 and B. Zywucki21 Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53 Kosice, Slovak Republic
2 Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 1 7, Poznan, Poland
Abstract
The magnetic Fredericksz transition in ferronematics (thermotropic nematic liquid crystals 7CB and MBBA combined with fine magnetic particles of size 10 nm) as a function of concentration of magnetic particles was studied by using simple dielectric tneasurements. The increase of the threshold magnetic field is observed in 7CB based ferronematic while the decrease of threshold field in MBBA based ferronematic is observed when the concentration of magnetic particles is increased. Experimental results are disscussed in framework of Brochard, de Gennes and Burylov, Raikher
theories.
© EDP Sciences 1997