[6a-C22-1~11] 22.1 Joint Session M "Phonon Engineering"

[6a-C22-10] Thermal conductivity of a layered boride compound PrRh_4.8B₂

〇Youhei Kakefuda¹, Kunio Yubuta², Toetsu Shishido², Shigeru Okada³, Naoyuki Kawamoto¹, Tetsuya Baba¹, Takao Mori¹ (1.NIMS, 2.Tohoku Univ., 3.Kokushikan Univ.)

Keywords:time-domain thermoreflectance

We have investigated thermal conductivity of a layered boride compound PrRh_4.8B₂ single crystal. The out-of-plane thermal conductivity of the PrRh_4.8B₂ was characterized by using time-domain thermoreflectance (TD-TR) method. Analysis of TD-TR signal by mirror image method reveals that thermal conductivity of PrRh_4.8B₂ is much lower than that of other borides. This indicates randomly located Rh vacancies depress phonon conduction effectively.