[9p-W371-1~16] 22.1 Joint Session M "Phonon Engineering"

[9p-W371-9] Surface potential measurements of thermoelectric materials under temperature gradient for local Seebeck coefficient mapping

〇Yuji Miyato¹, Yuki Komatsubara¹, Takafumi Ishibe¹, Yoshiaki Nakamura¹ (1.Osaka Unvi.)

Keywords:Thermoelectric material, Kelvin probe force microscopy, Seebeck effect

In this study, two-dimensional distributions of the thermo-induced voltages were measured on thermoelectric thin films while the horizontal temperature gradient was applied to the films, for the investigation of local Seebeck-coefficient distributions. We will report the concept of the sample holder to apply an enough temperature gradient to the sample, and the experimental results of the thermo-induced voltage distributions, measured by Kelvin probe force microscopy (KFM) known as a surface potential measurement technique.