[18a-P5-1~11] 9.5 New functional materials and new phenomena

[18a-P5-11] YH(x=3) fabricated using Pt caplayers under low density hydrogen gas

〇(M2)Takuma Sakai¹, Kaname Sato¹, Ryota Mikami¹, Nao Suganuma¹, Soziro Akisato¹, Masamiti Sakai¹, Taturo Hanaziri², Yoshikata Nakazima², Masahide Tokuda², Toshihiko Huzii², Osamu Nakamura³ (1.Saitama Univ., 2.Toyo Univ., 3.Okayama Univ of Sience.)

Keywords:yttrium

In YHx, the crystal structure transitions to hcp (x <0.21: α phase), fcc (x = 2: β phase), hcp (x = 3: γ phase) with increasing hydrogen concentration x.And there is transition from metal to semiconductor at x = 2.8.Further, when a Pd catalyst is used, the hydrogen absorption effect of the rare earth metal is promoted. In this study, the concentrations of each phase were calculated from X - ray diffraction results of YHx using Pt catalyst with catalytic effect like Pd catalyst. Then, when a sample of Pt = 5 nm and Y = 300 nm was hydrogenated at 150 ° C, almost complete γ phase single phase was successfully generated.