Tohoku University Technology: ZT Measurement of Transverse Thermoelectric Thin Films: T23-041
Single-setup, single-device measurement of thermoelectric coefficient, electrical conductivity, and thermal conductivity
To determine the dimensionless figure of merit ZT of thermoelectric materials, three physical quantities—Seebeck coefficient, electrical conductivity, and thermal conductivity—must be measured separately, which conventionally requires preparing multiple specimens and carrying out time‑consuming temperature‑dependent measurements. In addition to conventional longitudinal thermoelectric conversion based on the Seebeck effect, transverse thermoelectric conversion employing the anomalous Nernst effect (ANE) has recently attracted considerable attention. However, for transverse thermoelectric thin films, conventional ZT evaluation requires separate specimens for each of the three properties, and variations in interfacial conditions from sample to sample make accurate determination of ZT very challenging. The present technology provides a measurement method that enables all-in-one determination of all three key properties in transverse thermoelectric thin films. Because all measurements are performed on a single device with a single setup, the results are free from sample‑to‑sample variations in interface quality, allowing simpler and faster characterization.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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