Four Probe Method
Four Probe Method at different temperatures and determination of the band-gap The Four Probe Method is one of the standard and most widely used method for the measurement of resistivity. In its useful form, the four probes are collinear.
Description of the experimental set-up:
1. Probes Arrangement, It has four individually spring loaded probes. The probes are collinear and equally spaced. The probes are mounted in a teflon bush, which ensure a good electrical insulation between the probes.
2. Smaple: Germanium crystal in the form of a chip.
3. Oven : This is high quality temperature controlled oven suitable for Four Probe Set-up. The oven has been designed for fast heating and cooling rates, which enhances the effectiveness of the controller.
4. Four Probe Set-Up The set-up consists of three units housed in the same cabinet.
(i) Oven Controller
(ii) Multi range Digital Voltmeter
(iii) Constant Current GeneratorThe experimental set-up is complete in all respect.
Reviews
There are no reviews yet.