Hall effect: Application
Hall effect is also very useful as a means to measure the magnetic field as shown in Figure 09.
Figure 26.02: Application of Hall effect in measuring magnetic field.
The measurement of large magnetic fields on the order of a Tesla in most of the magnetometers such as vibrating sample magnetometer, squid magnetometer is often done by making use of the Hall effect.
A thin film Hall probe as shown in Figure 26.02 is placed in the magnetic field and the transverse voltage (on the order of microvolts) is measured.
For a given hall probe of 2 μm thickness, the applied current of 1 ampere and magnetic field of 2 Tesla (n = 8.47e28 electrons/m3) yields the Hall voltage of
