Magnetic-field-induced orientational order in the isotropic phase of hard colloidal platelets

Beek, D van der; Petukhov, A V; Vroege, G J; Lekkerkerker, H N.W.; Davidson, P; Ferre, J; Jamet, J P; Wensink, H H; Bras, W

doi:10.1103/PHYSREVE.73.0

Title: Magnetic-field-induced orientational order in the isotropic phase of hard colloidal platelets

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Abstract

The magnetic-field-induced orientational order in the isotropic phase of colloidal gibbsite [Al(OH){sub 3}] platelets is studied by means of optical birefringence and small-angle x-ray scattering (SAXS) techniques. The suspensions display field-induced ordering at moderate field strengths (a few Tesla), which increases with increasing particle concentration. The gibbsite particles align their normals perpendicular to the magnetic field and hence possess a negative anisotropy of their diamagnetic susceptibility {delta}{chi}. The results can be described following a simple, Onsager-like approach. A simplified model is derived that allows one to obtain the orientational distribution function directly from the scattering data. However, it leads to an underestimate of the diamagnetic susceptibility anisotropy {delta}{chi}. This accounts for the difference between the {delta}{chi} values provided by the two experimental techniques (SAXS and magneto-optics). The order of magnitude {delta}{chi}{approx}10{sup -22} J/T{sup 2} lies in between that of goethite suspensions and that of suspensions of organic particles.

Authors:

Beek, D van der; Petukhov, A V; Vroege, G J; Lekkerkerker, H N.W. ^[1]; Davidson, P; Ferre, J; Jamet, J P ^[2]; Wensink, H H ^[3]; Bras, W ^[4]

Van't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute, Utrecht University, Padualaan 8, 3584 CH Utrecht (Netherlands)
Laboratoire de Physique des Solides, UMR 8502 CNRS, Universite Paris-Sud, Batiment 510, 91405 Orsay (France)
Institut fuer Theoretische Physik II, Heinrich-Heine-Universitaet Duesseldorf, Universitaetsstrasse 1, Gebaeude 25.32, 40225 Duesseldorf (Germany)
Netherlands Organisation for Scientific Research (NWO), DUBBLE CRG, European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex (France)

Publication Date:: Sat Apr 15 00:00:00 EDT 2006

OSTI Identifier:: 20779237

Resource Type:: Journal Article

Journal Name:: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

Additional Journal Information:: Journal Volume: 73; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevE.73.041402; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-651X

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM HYDROXIDES; ANISOTROPY; BIREFRINGENCE; COLLOIDS; DIAMAGNETISM; DISTRIBUTION FUNCTIONS; GIBBSITE; GOETHITE; MAGNETIC FIELDS; MAGNETIC SUSCEPTIBILITY; MAGNETO-OPTICAL EFFECTS; PARTICLES; SMALL ANGLE SCATTERING; SUSPENSIONS; X-RAY DIFFRACTION

Citation Formats


                    Beek, D van der, Petukhov, A V, Vroege, G J, Lekkerkerker, H N.W., Davidson, P, Ferre, J, Jamet, J P, Wensink, H H, and Bras, W. Magnetic-field-induced orientational order in the isotropic phase of hard colloidal platelets.  United States: N. p., 2006. 
        Web.  doi:10.1103/PHYSREVE.73.0.

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                    Beek, D van der, Petukhov, A V, Vroege, G J, Lekkerkerker, H N.W., Davidson, P, Ferre, J, Jamet, J P, Wensink, H H, & Bras, W. Magnetic-field-induced orientational order in the isotropic phase of hard colloidal platelets.  United States.  https://doi.org/10.1103/PHYSREVE.73.0

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                    Beek, D van der, Petukhov, A V, Vroege, G J, Lekkerkerker, H N.W., Davidson, P, Ferre, J, Jamet, J P, Wensink, H H, and Bras, W. 2006.  
        "Magnetic-field-induced orientational order in the isotropic phase of hard colloidal platelets".  United States.  https://doi.org/10.1103/PHYSREVE.73.0.

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@article{osti_20779237,

  title        = {Magnetic-field-induced orientational order in the isotropic phase of hard colloidal platelets},

  author       = {Beek, D van der and Petukhov, A V and Vroege, G J and Lekkerkerker, H N.W. and Davidson, P and Ferre, J and Jamet, J P and Wensink, H H and Bras, W},

  abstractNote = {The magnetic-field-induced orientational order in the isotropic phase of colloidal gibbsite [Al(OH){sub 3}] platelets is studied by means of optical birefringence and small-angle x-ray scattering (SAXS) techniques. The suspensions display field-induced ordering at moderate field strengths (a few Tesla), which increases with increasing particle concentration. The gibbsite particles align their normals perpendicular to the magnetic field and hence possess a negative anisotropy of their diamagnetic susceptibility {delta}{chi}. The results can be described following a simple, Onsager-like approach. A simplified model is derived that allows one to obtain the orientational distribution function directly from the scattering data. However, it leads to an underestimate of the diamagnetic susceptibility anisotropy {delta}{chi}. This accounts for the difference between the {delta}{chi} values provided by the two experimental techniques (SAXS and magneto-optics). The order of magnitude {delta}{chi}{approx}10{sup -22} J/T{sup 2} lies in between that of goethite suspensions and that of suspensions of organic particles.},

  doi          = {10.1103/PHYSREVE.73.0},

  url          = {https://www.osti.gov/biblio/20779237},
  journal      = {Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics},

  issn         = {1063-651X},

  number       = 4,

  volume       = 73,

  place        = {United States},

  year         = {Sat Apr 15 00:00:00 EDT 2006},

  month        = {Sat Apr 15 00:00:00 EDT 2006}

}

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