Experimental Probe for Measurement of Thermodynamic Properties

ORAL

Abstract

Our measurement probe was designed and built to measure thermoelectric power (TEP, Seebeck coefficient) and thermal conductance. This measurement probe is custom made to fit in our cryocooler refrigerator for the temperature range from 11 K to 300 K. By using a small, 2k$\Omega $ resistive heater chip, and careful thermal isolation, we can apply a temperature gradient across our samples. We then monitor the raw trace of temperature and thermoelectric voltage as a function of time. Later, we extract the thermal conductance and the TEP by using the thermal equilibrium data. Automated data acquisition from room temperature to $\sim $12 K is obtained using LabVIEW software. Calibration of the measurement probe was performed on a Nickel sample and the measured TEP is compared to literature values to demonstrate the accuracy. The probe is being developed and calibrated for use in our investigation of TEP and thermal conductivity in single crystal samples of Pr$_{1-x}$Nd$_{x}$Os$_{4}$Sb$_{12}$ in the future.

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Authors

  • Nicholas Soliz

    Department of Physics at CSU, Fresno

  • G.V. Brown

    Department of Physics at CSU, Fresno, Lawrence Livermore National Laboratory, Stanford University, Advanced Light Source, Lawrence Berkeley National Lab, Nanoelectronics Research Institute, Japan Atomic Energy Agency, University of Tokyo, Cornell University, Tokyo Institute of Technology, Suranaree University of Technology, Shandong University, Stanford Synchrotron Radiation Lightsource, UC Davis, CSU Dominguez Hills, Thomas Jefferson National Accelerator Facility, UC Berkeley, ANL, UChicago/ANL, UManitoba, Northwestern U/ANL, LLNL, UCB/LLNL, McGill U, McGill U/ANL, University of Nevada, Reno, Hitachi Global Storage Technology, Advanced Light Source, Stanford Synchrotron Radiation Laboratory, Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Materials Science and Engineering, Stanford University, Radiation Oncology, Stanford University School of Medicine, Missouri University of Science and Technology, International Institute of Physics, University of Missouri, University of Notre Dame du Lac, Department of Physics, California State University, Fresno, California, California State University Long Beach, BNL, IWF Dresden, Department of Physics, University of California, Davis, CA 95616, USA, University of California, Merced, Laboratoire Univers et Particules de Montpellier, IN2P3 (France), SLAC National Accelerator Laboratory/Stanford University/KIPAC, University of Perugia, University of Washington, CEA/Saclay, UNR, UNM, UCSD, RAL, ILE, MIT, LANL, LLE, NRL, SLAC National Accelerator Laboratory, Technische Universitaet Berlin, Max Born Institut, Hiroshima University, Western Michigan University, MPIK

  • Pei-Chun Ho

    Department of Physics at CSU, Fresno