Influence of Brownian motion on the electrical properties of a nanostructured magnetic fluid

The temperature of a magnetic fluid and then the Brownian motion of the magnetic nanoparticles within it may change through electrically heating the magnetic fluid.By this means,the influence of Brownian motion on the electrical properties of the magnetic fluid was investigated.The microcosmic process of the electro-transport within the magnetic fluid and the physical mechanism of the Brownian-motion-dependent conductance were analyzed.The experimental phenomena were then well explained.An exponentially decaying function was employed to fit the experimental data during the thermal dispersion process.And then the characteristic time corresponding to the thermal dispersion was derived.It indicates that the Brownian-motion-dependent electrical properties of the magnetic fluid can be utilized to study the process of its thermal dispersion.Therefore,magnetic fluid as a carrier can provide a novel method for exploring some microcosmic physical processes.