ISSN:
1089-7550
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
Cubic Laves phase alloy YFe2 forms four types of hydrides, YFe2Hx: β1, β2 (hexagonal) of 1.2〈x〈1.6, γ (hexagonal) of 2.8〈x〈3.45, and δ (orthorhombic) of 3.7〈x. The β1 and β2 hydrides are formed in the hydrogen absorption below and above 500 K. The deuterides YFe2Dx have been prepared by deuterium absorption at various temperatures for YFe2 powders of diameters less than 0.3 mm. The formed samples are mixtures of main and extra deuteride phases. The x-ray and magnetization measurements in a magnetic field of 10.6 kOe showed five types of ferromagnetic deuterides with Curie temperatures of about 100 K (δ1), 300 K (δ2), 380 K (γ), 300–380 K (β1), and 540 K (amorphous). The extrapolated values of magnetization at 0 K are 3.5μB/YFe2Dx. The crystal structures are as follows: δ1, hexagonal, a=0.57 nm, c=2.74 nm; δ2, cubic, a=0.79 nm; γ, hexagonal, a=0.56 nm, c=2.63 nm; and β, hexagonal (a=0.53 nm, c=0.87 nm)–(a=0.51 nm, c=0.82 nm). © 1996 American Institute of Physics.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.361854
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