Crystal growth of magnetic dihydride Gd sub(x)Y sub(1-x)H sub(2) for generation of spin current

• Published in: Journal of crystal growth 2013-09, Vol.378, p.351-355
• Main Authors: Sakuraba, T, Hirama, H, Sakai, M, Honda, Z, Hayakawa, M, Okoshi, T, Kitajima, A, Oshima, A, Higuchi, K, Hasegawa, S
• Format: Article
• Language: English
• Subjects: Crystal growth; Deposition; Diffraction; Extrapolation; Hall effect; Lattice parameters; Magnetic permeability; Phases
• ISSN: 0022-0248

Crystal growth of pure phases of Gd sub(x)Y sub(1-x)H sub(2) (0 less than or equal to x less than or equal to 1) was successfully carried out by depositing Gd sub(x)Y sub(1-x) films and their hydrogenation, the growth results of which were investigated by X-ray diffraction measurements as well as temperature (T) dependence of magnetic susceptibility (%). The fcc lattice constant in Gd sub(x)Y sub(1-x)H sub(2) is found to be linearly increased with increasing x. Behavior characteristic to the para-to-antiferromagnetic transition are clearly observed in the %-T curve for x = 0.39, 0.47, 0.76, and 1.0 cases. The Neel temperature (T sub(N)) is found to be linearly decreased with decreasing x from x = 1.0 (GdH sub(2)), and is predicted to show T sub(N) = 0 K at x similar to 0.1 by extrapolating T sub(N) from large x region, implying the antiferromagnetic order disappears at x similar to 0.1. The quasi-zero Hall effect was observed for x = 0, 0.19, 0.37, 0.39, and 0.47 cases, whereas a moderate Hall effect is observed for x = 0.76 and 1.0 cases. The type of Hall effect is also discussed.