Home built equipment for measuring Hall coefficient and charge carrier concentration, mobility and resistivity

TY - CONF

T1 - Home built equipment for measuring Hall coefficient and charge carrier concentration, mobility and resistivity

AU - Borup, Kasper Andersen

AU - Christensen, Mogens

AU - Blichfeld, Anders Bank

AU - Johnsen, Simon

AU - Toberer, Eric

AU - Snyder, G. Jeffrey

PY - 2011/7/17

Y1 - 2011/7/17

N2 - We present here a home built setup for measuring the specific resistivity, hall coefficient, and charge carrier concentration and mobility at elevated temperatures. The system is optimized for measurements of samples ranging between doped semiconductors and high resistivity metals and uses the van der Pauw method. The commercial availability of these systems is limited and they are usually not optimized for measurements on samples which show properties characteristic of thermoelectric materials. We give an assessment of the reliability of the measurements and a comparison with a commercial system, the Quantum Design, Physical Properties Measurement System (PPMS). Measurements on samples with different resistivity and charge carrier concentration will be shown, covering both ends of the interval of samples we are able to measure as well as the range normally observed for thermoelectrics. The comparison will be based on room temperature measurements.

AB - We present here a home built setup for measuring the specific resistivity, hall coefficient, and charge carrier concentration and mobility at elevated temperatures. The system is optimized for measurements of samples ranging between doped semiconductors and high resistivity metals and uses the van der Pauw method. The commercial availability of these systems is limited and they are usually not optimized for measurements on samples which show properties characteristic of thermoelectric materials. We give an assessment of the reliability of the measurements and a comparison with a commercial system, the Quantum Design, Physical Properties Measurement System (PPMS). Measurements on samples with different resistivity and charge carrier concentration will be shown, covering both ends of the interval of samples we are able to measure as well as the range normally observed for thermoelectrics. The comparison will be based on room temperature measurements.

M3 - Poster

ER -