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  Nematic order in ferrofluids

Pleiner, H., Jarkova, E., Müller, H. W., & Brand, H. R. (2002). Nematic order in ferrofluids. Journal of Magnetism and Magnetic Materials, 252(1-3), 147-149.

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 Creators:
Pleiner, Harald1, Author           
Jarkova, E.1, Author           
Müller, H. W.1, Author           
Brand, H. R.1, Author           
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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Free keywords: nematic order; ferrofluids; Landau free energy; phase transition
 Abstract: With the help of a Landau free energy we discuss the phase transition from an isotropic ferrofluid to a nematic one. The latter can be either superparamagnetic or ferromagnetic. The transitions are first order and the ferromagnetic state can be reached directly from the isotropic one or via the superparamagnetic nematic one. An external magnetic field induces magnetic as well as nematic order. The transition to the ferronematic state is then via an imperfect bifurcation switching from a state of low nematic and magnetic order to one with strong nematic order and either (still) low or high magnetic order. In the latter case the director is either parallel or perpendicular to the external field (and the magnetization parallel to it) or all three directions are different (but lie in a common plane). Some hydrodynamic features of these phases are listed. (C) 2002 Elsevier Science B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2002-11
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: eDoc: 28437
ISI: 000179686200048
Other: P-02-141
 Degree: -

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Title: Journal of Magnetism and Magnetic Materials
  Alternative Title : J. Magn. Magn. Mater.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 252 (1-3) Sequence Number: - Start / End Page: 147 - 149 Identifier: ISSN: 0304-8853