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A liquid that consists of a colloidal suspension of ferromagnetic particles and that becomes strongly polarized in the presence of a magnetic field. Ferrofluids do not retain the polarization once the magnetic field is removed.

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References in periodicals archive ?
Current paper is devoted to studying shielding properties of cylindrical thick-walled ferrofluid layers protecting against uniform magnetic fields, where ferrofluids of various concentration of ferroparticles are considered.
Rosenman, Magnetic and optical properties of ionic ferrofluids based on nickel ferrite nanoparticles, J.
Gomez, "Thermal diffusivity of ferrofluids as a function of particle size determined using the mode-mismatched dual-beam thermal lens technique," Journal of Applied Physics, vol.
Bakandritsos et al., "Immobilization of magnetic iron oxide nanoparticles on laponite discs--an easy way to biocompatible ferrofluids and ferrogels," Journal of Materials Chemistry, vol.
Indeed, this EPS was used to coat magnetic nanoparticles to produce biocompatible ferrofluids using the coprecipitation method.
Reznikov et al., "Magnetic measurements as a key to the particle size distribution in ferrofluids: experiment, theory and computer simulations," Magnetohydrodynamics, vol.
Vaishnava, "Magnetic and optical response of tuning the magnetocrystalline anisotropy in Fe3O4 nanoparticle ferrofluids by Co doping," Journal of Magnetism and Magnetic Materials, vol.
[16] reported that magnetic particles (ferrofluids) could have both miscible and immiscible behaviors with water.
Ramazanova et al., "Magnetoviscous effect in ferrofluids with different dispersion media," Journal of Magnetism and Magnetic Materials, vol.
Cobalt ferrite based nanocomposites present unique physicochemical properties that make it an attractive material for catalysis, antenna rods, loading coils, magnetic data storage, sensors, ferrofluids, magnetooptic materials, energy conversion applications, and targeted drug delivery [1-6].
Electrostatically stabilized ferrofluids were prepared by ultrasound treatment using sodium citrate solutions (5 mM) in distilled water.