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Magnetic-field-tuned Insulator to Conductor Transition in Magnetorheological Suspension
Journal of Magnetics, Volume 19, Number 4, 31 Dec 2014, Pages 345-348
Abstract
Magnetorheological suspensions (MRSs) are smart materials that have the potential to revolutionize several industrial sectors because of their special rheological behaviors. In this paper, MRS, based on carbonyl iron (CI) microparticles that were dispersed in silicone oil with oleic acid, were prepared. We showed that the electroconductibility of MRS was significantly influenced by the intensity of the external magnetic field that was applied. The resistance value can vary from infinite to below 300 Ω after applying an external magnetic field. The results indicated that this MRS had the property of magnetic-field-tuned insulator to conductor transition. This system has potential applications in controllable MRS electrical devices.
Keywords: electroconductibility; magnetorheological suspensions; magnetic materials; rheological properties; electrical properties
DOI: http://dx.doi.org/10.4283/JMAG.2014.19.4.345
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