Biaxial magnetometer sensor

A simple two-axis fluxgate magnetometer has been developed to measure weak magnetic fields by using magnetization rotation processes. To obtain these magnetization processes, we use circular discs of a very thin soft magnetic material as cores. These cores are magnetized by a rotating magnetic field high enough to saturate them. Thus, the magnetization processes are due to magnetization rotation and the only losses are due to macro-eddy currents. This kind of device can also be used to measure the magnetic field in two perpendicular directions by using a single core and, in principle, the exciting field frequency can be greater than in conventional fluxgate magnetometers. The maximum calculated sensitivity of this device is 5.3 times higher than that of a conventional fluxgate magnetometer of similar dimensions.