[5p-A503-1~15] 9.4 Thermoelectric conversion

[5p-A503-2] Dependence od thermoelectric properties on Ge ratio in composite of MnSi_1.7 and SiGe

〇Yosuke Kurosaki¹, Shin Yabuuchi¹, Akinori Nishide¹, Jun Hayakawa¹ (1.Hitachi, Ltd.)

Keywords:silicide, nanocomposite

We try to increase thermoelectric figure of merit ZT of MnSi_1.7 by fabricating nanocomposite structures. In this study, dependence of thermoelectric properties on Ge amount was investigated in nanocomposite of MnSi_1.7 with SiGe. Both the thermal conductivity and electrical resistance decrease with the Ge amount, while the Seebeck coefficient is almost unchanged. Thus, increase of Ge amount is clarified to be effective for increase of the ZT.