Magnetic field dependent ordering in ferrofluids at SiO2 interfaces

A. Vorobiev, J. Major, H. Dosch, G. Gordeev, D. Orlova

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Abstract

The effect of the ferrofluid-wall interactions onto ordering in silica (SiO2) interfaces that can become important for future nanoconfinement geometries was discussed. It was found that the ordered layers of a magnetite nanoparticles form that can be extended up to 30 layers in the presence of small magnetic fields perpendicular to the interface. It was also found that the short ranged ordered structures emerged when the magnetic field direction was parallel to the interface. The results that were obtained by in situ neutron reflectometry revealed the formation of a wetting double-layer that formed the magnetic template for the observed ordering sheets.

Original languageEnglish
Article number267203
JournalPhysical review letters
Volume93
Issue number26 I
DOIs
Publication statusPublished - Dec 31 2004

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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