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 Co
x
Fe
3-x
O
4
/(PbMg
0.33
Nb
0.67
O
3
)
0.67
-(PbTiO
3
)
0.33
heterostructure to fabricate the magnetic sensor that can be controlled by electric field. By controlling the components of Co
x
Fe
3-x
O
4
, we obtain the Co
0.2
Fe
2.8
O
4
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 Fe
3
O
4
film. Our finding reveals that the magnetocoupling structure has the potential for controllable sensor.