An experimental setup for the simultaneous measurement of thermoelectric power of two samples from 77 K to 500 K

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Inter University Accelerator Centre India

Abstract

We report on an experimental setup for the simultaneous measurement of the thermoelectric power (TEP) of two samples in the temperature range from 77 K to 500 K using optimum electronic instruments. The setup consists of two rectangular copper bars in a bridge arrangement for sample mounting, two surface mount (SM) chip resistors for creating alternate temperature gradient, and a type E thermocouple in differential geometry for gradient temperature (Delta T) measurement across the samples. In addition, a diode arrangement has been made for the alternate heating of SM resistors using only one DC current source. The measurement accuracy of Delta T increases with the differential thermocouple arrangement. For the calibration of the setup, measurements of TEP on a high purity (99.99%) platinum wire and type K thermocouple wires Chromel and Alumel have been performed from 77 K to 500 K with respect to copper lead wires. Additionally, this setup can be utilized to calibrate an unknown sample against a sample of known absolute TEP. (C) 2014 AIP Publishing LLC.

Details

Original languageEnglish
Article number085115
Number of pages7
JournalReview of Scientific Instruments
Volume85
Issue number8
Publication statusPublished - Aug 2014
MoE publication typeA1 Journal article-refereed

    Research areas

  • MAGNETIC-FIELDS, THERMOPOWER

ID: 14138117