摘要
In this study, a magnetic particle microseparator using patterned magnetic films to switch on and off separation is proposed, and numerical simulation is performed to analyze the function of the microseparator. Two magnetic films with the same magnetic dipole moment and different magnetization switching fields are used to produce open and closed magnetic fluxes that can exert different forces on the magnetic particles. For the case of open magnetic flux where the separation is on, almost all magnetic particles are trapped by the magnetic force, and the separation rate is 87.5%. For the case of closed magnetic flux where the separation is off, most of the magnetic particles pass through the separation region without being trapped. © 2010, American Institute of Physics. All rights reserved.