Compositional dependence of the film thickness of samples, immediately after sputtering (open circles), in the hydrogenated state (filled circles) and calculated assuming the formation of (stars).
XRD patterns of (▵), (엯), (◻), and Mg (☆) thin films (a) as-sputtered, (b) after hydrogenation, and (c) after dehydrogenation.
(Color online) Reflection of as-sputtered (with , 0.05, and 0.10) thin films (capped with Pd) measured through the quartz substrate. Literature values for Mg (Ref. 24) and Pd (Ref. 25) are included for comparison.
(Color online) Time dependence of the electrical resistivity of (with , 0.05, and 0.10)/ Pd thin films, upon exposure to hydrogen pressure at room temperature. The insert is a blowup of the curves for the first .
Variation of the electrical resistivity of as a function of the Pd-concentration : (◻) this work, (▴) from Ref. 13 and solid line: fitting of experimental data by Eq. (2).
Optical reflection (squares) and transmission (circles) of (with , 0.05, and 0.10)/ Pd thin films after of exposure to hydrogen pressure at room temperature. Solid lines correspond to the fitting of the curves using Eq. (4).
(Color online) Absorption coefficient of hydrogenated with (a) , (b) , and (c) , calculated from Eq. (3). Solid lines correspond to the extrapolation of the linear increase of caused by the opening of the band gap; the lines are assumed to cross the energy axis at . The insert shows the compositional dependence of (▴ from Ref. 13).
(Color online) Dielectric constants (filled symbols) and (open symbols) of (with , 0.05, and 0.10), calculated from Eq. (4).
Evolution of the optical transmission of a gradient sample (with ) exposed to at room temperature, as a function of time. RBS measurements show a linear compositional gradient over the whole sample.
(Color online) Variation of the logarithm of transmission as a function of time for different composition of gradient sample exposed to hydrogen pressure at room temperature: (◻) , (▿) , (◁) , (▷) , (▵) , and (엯) .
Hydrogen absorption rate as a function of the Pd concentration in thin film. The solid line is added to highlight the almost linear behavior.
Time dependence of the electrical resistivity of exposed to air at room temperature. Horizontal arrows indicate the measured values before hydrogenation and after dehydrogenation in air.
Refined parameters obtained by fitting reflection and transmission curves of using Eq. (4). Units are eV if not specified (except , no units).
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