Versatile Seebeck and electrical resistivity measurement setup for thin films.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Thermodynamics

Background:

• Accurate measurement of thermoelectric properties is crucial for developing advanced materials.
• Existing setups may have limitations in temperature range or measurement precision for thin films.
• Characterizing Seebeck coefficient and electrical resistivity is key to understanding material performance.

Purpose of the Study:

• To develop and validate a custom experimental setup for measuring Seebeck coefficient and electrical resistivity.
• To enable measurements on thin films across a wide temperature range (10-300 K).
• To ensure high accuracy and reliability in thermoelectric property determination.

Main Methods:

• A novel two-probe arrangement was designed for both Seebeck coefficient and electrical resistivity measurements.
• Seebeck coefficient measurement utilizes dynamical or steady/quasi-steady differential methods.
• Temperature gradients are precisely controlled using resistive heaters in copper blocks, ensuring good thermal contact with the sample.

Main Results:

• The developed setup successfully measured Seebeck coefficient and electrical resistivity of thin films.
• Measurements were validated against commercial niobium foil and a previously studied spin valve.
• Experimental results showed excellent agreement (within ~3%) with reference data, confirming setup reliability.

Conclusions:

• The custom-built setup provides a reliable and accurate method for characterizing thermoelectric properties of thin films.
• This system facilitates the study of materials in the 10-300 K temperature range.
• The validated setup can be a valuable tool for research in thermoelectric materials and devices.