Hall effect experiment lab manual

EXPERIMENT HALL EFFECT AND RESISTIVITY MEASUREMENTS IN DOPED GAAS 1 Experiment 14 Hall Effect and Resistivity Measurements in Doped GaAs Note: This laboratory manual is based on a manual for a very similiar experiment from the Physics Advanced Undergraduate Laboratory at UC Berkeley (see references). t – thickness, w – width. VH – Hall voltage. If the magnetic field is applied along negative z-axis, the Lorentz force moves the charge carriers (say electrons) toward the y-direction. This results in accumulation of charge carriers at the top edge of the sample. The Hall constant is defined as: RH = 1 ne () Substituting Eq. in Eq VH = RHB w I () Eq. can be written as follows: RH = VHw IB () From Eq. it can be seen that the Hall voltage changes linearly with magnetic field and such a ‘Hall probe’ device is often used to measure magnetic fields. It is not practical to use metals inFile Size: KB.

Learn how to perform Hall effect experiment in the simulation mode in a virtual lab. Fig.1 Schematic representation of Hall Effect in a conductor. CCG - Constant Current Generator, J X - current density ē - electron, B - applied magnetic field t - thickness, w - width V H - Hall voltage. If the magnetic field is applied along negative z-axis, the Lorentz force moves the charge carriers (say electrons) toward the y-direction. Hall Effect Experiment by Dr. G. Bradley Armen Department of Physics and Astronomy Nielsen Physics Building In this lab we will only be concerned with the Hall coefficient. 4 There is also a fractional quantum Hall effect. In the SI system the Hall coefficient unit is (volt m)/(amp tesla) or Ωm/T.

t – thickness, w – width. VH – Hall voltage. If the magnetic field is applied along negative z-axis, the Lorentz force moves the charge carriers (say electrons) toward the y-direction. This results in accumulation of charge carriers at the top edge of the sample. The Hall effect probe is a thin slab of indium arsenide, InAs, cemented to a piece of fiberglass. A four lead cable is attached so that the necessary electrical circuit can be used to detect the Hall voltage. The probe is equipped with a bakelite handle that is used to hold the probe in place. The white and green. User's Manual HALL EFFECT SETUP Manufactured by: SCIENTIFIC EQUIPMENT SERVICES /1 New Adarsh Nagar, Roorkee INDIA Ph.: , Fax: Email: ses@www.doorway.ru Website: www.doorway.ru