Lyotropic ferronematics: Magnetic orientational transition in the discotic phase

We report the synthesis of lyotropic ferronematics with a content of magnetic nanoparticles ($\rm \sim 6 \;nm$) up to 1 vol.%. In the ferrodiscotic phase we observe a magnetic Frederiks transition with critical fields about two orders of magnitude lower than that for an undoped lyotropic system. A m...

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Bibliographic Details
Published in:Europhysics letters 1998-03, Vol.41 (5), p.507-512
Main Authors: Berejnov, V, Bacri, J.-C, Cabuil, V, Perzynski, R, Raikher, Yu
Format: Article
Language:English
Subjects:
61.30.Eb
61.30.Gd
75.50.Mm
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Summary:We report the synthesis of lyotropic ferronematics with a content of magnetic nanoparticles ($\rm \sim 6 \;nm$) up to 1 vol.%. In the ferrodiscotic phase we observe a magnetic Frederiks transition with critical fields about two orders of magnitude lower than that for an undoped lyotropic system. A model accounting for the magnetic polarization behavior of the studied ferronematics is presented.
ISSN:0295-5075
1286-4854
DOI:10.1209/epl/i1998-00182-9