Abstract
Magnetic functional fluids are magnetizable suspensions and they are widely studied for various industrial applications. Physical properties of magnetic functional fluids depend on the properties of suspended magnetic particles. In this report, damping force properties of damper utilizing magnetic functional fluids are investigated experimentally; especially we focus on the effects of mixture ratio of volume fraction of nano-sized magnetic particles to that of micron-sized magnetic particles. When the mixture ratios are different, the damping properties are different even if the total volume fractions are equal.
