The resistivity measurements of semiconductors can not reveal whether one or two types of carriers are present; nor distinguish between them. However, this information can be obtained from Hall Coefficient measurements, which are also basic tools for the determination of carrier density and mobilities in conjuction with resistivity measurement.
As you are undoubtedly aware, a static magnetic field has no effect on charges unless they are in motion. When the charges flow, a magnetic field directed perpendicular to the direction of flow produces a mutually perpendicular force on the charges. When this happens, electrons and holes will be separated by opposite forces. They will in turn produce an electric field (h) which depends on the cross product of the magnetic intensity,, and the current density, J. h= Rx Where R is called the Hall coefficient. Now, let us consider a bar of semiconductor, having dimension, x, y and z. Letis directed along X andalong Z thenhwill be along Y, as in Fig. 2. Then we could write. Where Vh is the Hall voltage appearing between the two surfaces perpendicular to y and I =yz
Hall Effect experiment consists of the following:
Hall Probe (Ge Crystal);(b)Hall Probe (InAs)
Hall Effect Set-up (Digital), DHE-21
Constant Current Power Supply, DPS-175 or DPS-50
Digital Gaussmeter, DGM-102
T/T (Bank Transfer)
About the Company
Year of Establishment2010
Legal Status of FirmSole Proprietorship (Individual)
Nature of BusinessWholesale Trader
Number of EmployeesUpto 10 People
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IndiaMART Member SinceNov 2013
The Scientific Engineering Works has created an authentic niche amongst the trusted companies in the industry. The ownership type of our corporation is sole proprietorship. The main head office of our corporation is located at Coimbatore, Tamil Nadu and from there we are administrating our entire corporation in a flawless manner. Since 2010, we are constantly setting new standards in trading by the regular support of our technically advanced production unit. The assortment of products in which we deal includes Liquid Nitrogen Container,Weighing Machine and many more.