Automatic thermal conductivity measurements with 3-omega technique
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Updated: Jan 28, 2026

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements
Published on: December 5, 2025
D A Chernodoubov1, A V Inyushkin1
1National Research Center "Kurchatov Institute," Moscow 123182, Russia.
Abstract:
This article describes an improvement of the 3-omega thermal conductivity measurement system facilitating automatic mode measurement. The use of the electrical circuit with negative feedback to compensate the first harmonic in the voltage signal on the heater-thermometer eliminates manual resistance tuning. To test the procedure, measurements of the thermal conductivity of single crystal sapphire Al2O3 were made. The experimental thermal conductivity value is in a good agreement with the reference data.
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