Control of Magnetic Sensor for Tunable Measure Range

Magnetic sensor can contactless monitor current in energy system, whose tunable measure range is very desirable in complex scenes. Here we use the CoxFe3-xO4/(PbMg0.33Nb0.67O3)0.67 -(PbTiO3)0.33 heterostructure to fabricate the magnetic sensor that can be controlled by electric field. By controlling the components of CoxFe3-xO4, we obtain the Co0.2Fe2.8O4 film device with proper hall resistance and strong response to applied voltage. Under the electric field from - 5kV/m to 5kV/m, an increment of 7.5 times in linear sensing range has been realized in the heterostructure, which is much larger than that in Fe3O4 film. Our finding reveals that the magnetocoupling structure has the potential for controllable sensor.