It cannot be used to find a magnetic field. Looking at the formula one can think that the magnetic field can be calculated but in the HALL Experiment, perpendicular MAGNETIC field and electric field are applied on the material and other parameters are measured.

The Hall effect can be used to measure the average drift velocity of the charge carriers by mechanically moving the Hall probe at different speeds until the Hall voltage disappears, showing that the charge carriers are now not moving with respect to the magnetic field.

The classical Hall effect is a charge Hall effect which builds up transverse charge accumulation. The anomalous Hall effect is a combination of charge and spin Hall which builds up transverse charge and spin accumulation. The origins of AHE have yet to be fully explained.

nq RH 1 = Page 2 2 In this lab, you will measure the Hall coefficient in a metal (copper) and in a p-type semiconductor. In the metal, the charge carriers are conduction electrons, so we expect a negative value of the Hall coefficient. In both cases, you will be able to determine the charge carrier density.

Applications. Hall probes are often used as magnetometers, i.e. to measure magnetic fields, or inspect materials (such as tubing or pipelines) using the principles of magnetic flux leakage. Hall effect devices produce a very low signal level and thus require amplification.

The Hall effect is the movement of charge carriers through a conductor towards a magnetic attraction. With all the flowing electrons of the carried current on one side of the conductor, that side is negatively charged and the other side is positively charged.

Principle of Hall Effect. The principle of Hall Effect states that when a current-carrying conductor or a semiconductor is introduced to a perpendicular magnetic field, a voltage can be measured at the right angle to the current path. This effect of obtaining a measurable voltage is known as the Hall Effect.

The Hall coefficient can be measured if the magnetic flux density of the magnet used is known, by determining the conductor thickness, the Hall voltage and the current intensity. The effect described above allows a non-contact and precise measurement of magnetic fields.

Hall sensors are commonly used to time the speed of wheels and shafts, such as for internal combustion engine ignition timing, tachometers and anti-lock braking systems. They are used in brushless DC electric motors to detect the position of the permanent magnet.

So, how does a Hall effect sensor work? Using semiconductors (such as silicon), Hall effect sensors work by measuring the changing voltage when the device is placed in a magnetic field. In other words, once a Hall effect sensor detects that it is now in a magnetic field, it is able to sense the position of objects.

Abstract. The anomalous Hall effect (AHE) occurs in solids with broken time-reversal symmetry, typically in a ferromagnetic phase, as a consequence of spin-orbit coupling.

The full modern semiclassical treatment of the AHE is reviewed which incorporates an anomalous contribution to wave-packet group velocity due to momentum-space Berry curvatures and correctly combines the roles of intrinsic and extrinsic (skew-scattering and side-jump) scattering-related mechanisms.

Current flow is one dimensional Current flows between contacts 5 and 6 Hall voltage measured between contacts 1 and 2 or contacts 4 and 3 Resistivity measured between contacts 1 and 4 or contacts 2 and 3

Four parameters of interest – Conductivity or resistivity – Carrier concentration – Carrier type sign of hall voltage – Mobility Temperature dependency can help determine basic properties of the material, like scattering mechanisms, Fermi level and excitation energies.