Precise magnetic sensors

Can magnetoresistors replace fluxgate sensors in precise applications such as navigation and detection of metal objects? Anisotropic Magnetoresistors (AMRs) and Giant Magnetoresistors (GMRs) can reach 10 nT resolution. It is possible to improve their stability by ac techniques, but the electronics becomes complex and consumes more power. If size is not limited, fluxgate sensors are still the winners. (C) 2003 Elsevier B.V. All rights reserved.