In this paper we present a study on the relation between the evolution, upon successive H(2) cycling, of the crystalline order and the H(2) sorption properties of Pd-capped textured Mg thin films grown on Si and glass substrates. Using an asymmetric diffraction geometry suitable for thin films, it is found that: i) hydrogen desorption can be achieved at low temperatures exposing the samples to air and ii) already upon one hydrogen absorption-desorption cycle, the original texture is lost. Moreover metal-to-insulator transition following magnesium hydride formation is observed through spectrophotometry. However, cycling results in being detrimental to film properties, mainly due to the Pd cap degradation and correlated processes.
Titolo: | Structural evolution of Pd-capped Mg thin films under H-2 absorption and desorption cycles |
Autori: | |
Data di pubblicazione: | 2009 |
Rivista: | |
Abstract: | In this paper we present a study on the relation between the evolution, upon successive H(2) cycling, of the crystalline order and the H(2) sorption properties of Pd-capped textured Mg thin films grown on Si and glass substrates. Using an asymmetric diffraction geometry suitable for thin films, it is found that: i) hydrogen desorption can be achieved at low temperatures exposing the samples to air and ii) already upon one hydrogen absorption-desorption cycle, the original texture is lost. Moreover metal-to-insulator transition following magnesium hydride formation is observed through spectrophotometry. However, cycling results in being detrimental to film properties, mainly due to the Pd cap degradation and correlated processes. |
Handle: | http://hdl.handle.net/11577/2435913 |
Appare nelle tipologie: | 01.01 - Articolo in rivista |
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