TY - JOUR
T1 - Experimental Setup of Ac Thermoelectric Power Measurements in a Cryocooler PPMS System and Its Implementation to Superconductors, Topological Insulator, and Thermoelectric Materials
AU - Shrestha, K.
AU - Gooch, M.
AU - Lorenz, B.
AU - Chu, C. W.
N1 - Funding Information:
ACKNOWLEDGMENTS This work is supported in part by the U.S. Air Force Office of Scientific Research Grant FA9550-15-1-0236, the T.L.L. Temple Foundation, the John J. and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston.
PY - 2019/4/1
Y1 - 2019/4/1
N2 - Abstract: We have designed and developed an experimental setup to measure the Seebeck coefficient of a variety of samples at cryogenic temperatures and under magnetic fields up to 7 T employing the physical property measurement system (PPMS). The measurement technique uses a low frequency ac thermal gradient generated by two thin film heaters in thermal contact with the sample. Heaters and temperature sensors are all fitted on a standard PPMS sample puck. The validity of this method is tested by measuring the thermoelectric power of several superconductors and thermoelectric samples. We have used this technique to measure the thermoelectric power of various topological insulator single crystals (Pb0.8Sn0.2Te, Bi2Te3, Bi2Se2.1Te0.9, and Sb2Te3). The developed hardware and software control is suitable for studying the thermoelectric power of small samples (length 2 mm) in a commercial cryomagnetic system (PPMS) and it allows for studying superconductor, semiconductor, thermoelectric, or topological insulator material in wide temperature (2–300 K) and magnetic field (0–7 T) ranges.
AB - Abstract: We have designed and developed an experimental setup to measure the Seebeck coefficient of a variety of samples at cryogenic temperatures and under magnetic fields up to 7 T employing the physical property measurement system (PPMS). The measurement technique uses a low frequency ac thermal gradient generated by two thin film heaters in thermal contact with the sample. Heaters and temperature sensors are all fitted on a standard PPMS sample puck. The validity of this method is tested by measuring the thermoelectric power of several superconductors and thermoelectric samples. We have used this technique to measure the thermoelectric power of various topological insulator single crystals (Pb0.8Sn0.2Te, Bi2Te3, Bi2Se2.1Te0.9, and Sb2Te3). The developed hardware and software control is suitable for studying the thermoelectric power of small samples (length 2 mm) in a commercial cryomagnetic system (PPMS) and it allows for studying superconductor, semiconductor, thermoelectric, or topological insulator material in wide temperature (2–300 K) and magnetic field (0–7 T) ranges.
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U2 - 10.1134/S002044121902026X
DO - 10.1134/S002044121902026X
M3 - Article
AN - SCOPUS:85065436568
SN - 0020-4412
VL - 62
SP - 298
EP - 303
JO - Instruments and Experimental Techniques
JF - Instruments and Experimental Techniques
IS - 2
ER -