Optical and electrical properties of holmium thin films as a function of hydrogen concentration

On the optical absorption coefficient of Gd hydride thin films: coexistence of the Gd (GdH2) and GdHx(GdH2+y) phases

“…In the case of thin samples consisting of nanosized grains, we expect the coexistence of two phases: α and β for hydrogen concentrations lower than 2 and β and γ for concentrations larger than 2. This assumption is supported by the characteristic behaviour of the resistivity measurements when a rare-earth metal absorbs hydrogen (for example, see figure 1 in [10]).…”

“…This last pressure is held for 30 min until the resistance change indicates equilibrium, then the system is evacuated. A more detailed explanation of the hydrogenation process is given in [10]. Samples and measurements are made at room temperature.…”

Metal-Semiconductor Transition on the Surface and in the Bulk of Europium Hydride Thin Film

“…Thus the majority of described investigations were performed ex situ and concerned bilayer systems in which RE lm is protected against oxidation by a thin palladium overcoat. This solution has been applied in studies of bulk phenomena (electrical and optical properties) associated with hydride formation in thin lms of several hexagonal metals, like Y [8], Gd [9], Tb [10], Ho [11]. We have recently performed in situ measurements of uncovered thin Gd [12] and Tb [13] lms during interaction with hydrogen, extending investigations into * corresponding author; e-mail: rnowakowski@ichf.edu.pl surface phenomena using the static capacitor method.…”