HALL

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.

Hall effect measurement system 8404

Hall effect measurement system 8404

Sample holder (oven option)

Sample holder (oven option)

Specification
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