Hall Measurement / Hall Effect Measurement System HMS8404
For a complete understanding of the electrical properties of a material, the knowledge of the electrical conductivity σ alone is often not sufficient. In fact, as the electrical conductivity is the product of the charge carrier density n, the mobility μ and the elementary charge, it is important to know n and μ as well. For measurements of the charge carrier density, the Hall effect is used.
The Hall effect measurement system 8404 (Lake Shore Cryotronics, Inc.) is able to perform DC as well as AC field Hall measurements in the van der Paw and the Hall bar geometry. The measurement of the electrical resistivity is also implemented in order to obtain all quantities σ, n and μ at the same time. In this set-up the AC field measurement option extends the mobility measurements down to 0.001 cm2/Vs. Furthermore, the system is equipped with a DC loop closed field control and an oven option. Samples are electrically contacted by four Inconel probes.
|Temperature range||RT … 1000 °C (oven option)|
|Size of the samples||max. 12 mm x 12 mm x 3 mm|
|Magnetic field||0.88 T (DC), 0.62 T (AC), 1.2 T (RT insert only)|
|Gas atmosphere||Ar (oven option)|
|Measurement range μ||1…106 cm2/Vs (DC), 10-3…106 cm2/Vs (AC)|
|Measurement range n||8*102…8*1023 cm-3|
|Measurement range ρ||10-5…105 Ωcm|