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Technical data


Hall effect in n- and p-germanium (Teslameter)

Article no: P2530102

Principle

The resistivity and Hall voltage of 2  rectangular germanium samples ( n- and p-) are measured as a function of temperature and magnetic field.
The band spacing, the specific conductivity, the type of charge carrier and the mobility of the charge carriers are determined from the measurements.

Tasks

  1. The Hall voltage is measured at room temperature and constant magnetic field as a function of the control current and plotted on a graph (measurement without compensation for defect voltage).
  2. The voltage across the sample is measured at room temperature and constant control current as a function of the magnetic induction B.
  3. The voltage across the sample is measured at constant control current as a function of the temperature. The band spacing of germanium is calculated from the measurements.
  4. The Hall voltage UH is measured as a function of the magnetic induction B, at room temperature. The sign of the charge carriers and the Hall constant RH together with the Hall mobility mH and the carrier concentration p are calculated from the measurements.
  5. The Hall voltage UH is measured as a function of temperature at constant magnetic induction B and the values are plotted on a graph.

Learning objectives

  • Semiconductor
  • Band theory
  • Forbidden zone
  • Intrinsic conductivity
  • Extrinsic conductivity
  • Valence band
  • Conduction band
  • Lorentz force
  • Magnetic resistance
  • Mobility
  • Conductivity
  • Band spacing
  • Hall coefficient

Scope of delivery

PHYWE Hall-effect unit HU 2 11801-01 1
Hall effect, p-Ge, carrier board 11805-01 1
Hall effect, n-Ge, carrier board 11802-01 1
Coil, 600 turns 06514-01 2
Iron core, U-shaped, laminated 06501-00 1
Pair of pole pieces, plane, 30 x 30 x 48 mm 06489-00 1
Hall probe, tangential, protection cap 13610-02 1
PHYWE Power supply, 230 V, DC: 0...12 V, 2 A / AC: 6 V, 12 V, 5 A 13506-93 1
Tripod base PHYWE 02002-55 1
Stand rods, stainless steel, various sizes 02031-00 1
Right angle clamp expert with fulcrum screw 02054-00 1
Connecting cable, 32 A, red, various lengths 07361-01 3
Connecting cable, 32 A, blue, various lengths 07361-04 2
Connecting cable, 32 A, black, various lengths 07362-05 2
PHYWE Teslameter, digital 13610-93 1
PHYWE Digital multimeter, 600V AC/DC, 10A AC/DC, 20 MΩ, 200 µF, 20 kHz, −20°C…760°C 07122-00 1

PHYWE Systeme GmbH & Co. KG
Robert-Bosch-Breite 10 – 37079 Göttingen – Germany
www.phywe.com