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Measure the Hall voltage by using Gauss & Tesla Meter.

                                      Experiment-5B

Aim: To measure the Hall voltage.

Apparatus :

1. Gauss and tesla meter NV621
2.Electromagnet
3. PC interference S/W (NV621)
4. Hall Probe
5. InAs probe
6. constant current power supply NV623

Procedure:

1. Keep the pole distance of 20mm

2. Connect InAs probe and switch on the gauss and tesla meter

3. Adjust zero reading on display by zero adjust potentiometer and ready for measurement

4. Now take a measurement unit and set it as follows

a) Heater current potentiometer at the minimum position (anticlockwise position)
b) probe current potentiometer at the minimum position (anticlockwise position)

5.connect the hall probe in the given socket (NV622).

6. switch on the constant current power supply and set some low-value current.

7. switch on measurement unit and increase the probe current by probe current potentiometer and fix it at 5mA.

8. there may be some voltage reading even outside the magnetic field. this is due to the imperfect arrangement of the Hall probe and generally known as the “zero field potential”. In all cases, this error should be subtracted from the hall voltage reading as we consider it as a reference.

9. Now place the hall probe b/w magnetic poles using stand such that the magnetic and electric field should be perpendicular to each other.

10. Due to this arrangement, a force is generated in semiconductor, therefore a potential difference is developed in a semiconductor wafer, which is perpendicular of both fields (magnetic & electric). this potential difference is called Hall voltage.

11. measure & record this potential difference on the display (NV622)

12. measure Hall voltage for both side probe.

13. Subtract Zero field potential and take the mean of both sides hall voltage readings. This is  Hall voltage VH.

Observation :


Result:

Measurement of the Hall voltage has done correctly.

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