The effect of magnetic flux concentrator uniformity on GMR (Giant Magnetoresistance) biosensor performance-based simulation analysis

Due to magnetic flux concentrator (MFC) can cluster and aggregate magnetic field flux, so it can improve the GMR biosensor sensitivity, and the uniformity of the magnetic field in GMR biosensor detection area plays a great significance on GMR biosensor performance. Therefore, this paper employs the COMSOL software to study the characteristics of magnetic field generated by the magnetic flux concentrator. The influence of various parameters (length, thickness, etc.) of the magnetic flux concentrator on the uniformity of the magnetic field in GMR biosensor detection area had been investigated. The simulation results have certain theoretical guidance for high sensitivity GMR biosensors design.