1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Formation and dissociation of in epitaxial Mg thin films
Rent:
Rent this article for
USD
10.1063/1.2736304
/content/aip/journal/jap/101/11/10.1063/1.2736304
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/11/10.1063/1.2736304

Figures

Image of FIG. 1.
FIG. 1.

Diagram drawn to scale of the unit cells of (a) hcp Mg and (b) rutile , with the -axis of both unit cells oriented as shown. In (b) we represent the Mg atoms as white circles and the H atoms as black circles. For hcp Mg, and , while for rutile , and .

Image of FIG. 2.
FIG. 2.

X-ray diffraction scans of Mg capped with Pd on a glass substrate (a) after growth; (b) after hydrogen charging; and (c) after hydrogen discharging. Only new peaks are labeled. The insets show the rocking curves of the main Mg and reflections.

Image of FIG. 3.
FIG. 3.

X-ray diffraction scans of Mg capped with Pd on an substrate (a) after growth; (b) after hydrogen absorption; and (c) after hydrogen desorption. Only new peaks are labeled.

Image of FIG. 4.
FIG. 4.

X-ray diffraction scans of Mg capped with Pd on an substrate (a) after growth; (b) after hydrogen absorption; and (c) after hydrogen desorption. The scales of the ordinate axes have been adjusted for clarity.

Image of FIG. 5.
FIG. 5.

Schematic drawn to scale of the probable epitaxial growth mode of on Mg on (001) in the configuration. For clarity, only the Mg atoms in are shown.

Image of FIG. 6.
FIG. 6.

X-ray diffraction rocking curves of the (002) Mg reflection of Mg films capped with Pd on after charging and after discharging. The thicknesses of the Mg layer, and the fractions of the film hydrided according to integrated intensity ratios, are listed. The scales of the ordinate axes have been adjusted for clarity.

Image of FIG. 7.
FIG. 7.

X-ray diffraction scans of Mg capped with Pd on a substrate (a) after growth; (b) after hydrogen absorption; and (c) after hydrogen desorption. Only new peaks are labeled.

Image of FIG. 8.
FIG. 8.

X-ray diffraction scans of Mg capped with Pd on an substrate (a) after growth; (b) after hydrogen absorption; and (c) after hydrogen desorption. The scales of the ordinate axes have been adjusted for clarity.

Image of FIG. 9.
FIG. 9.

The resistances (left ordinate axis) of Mg capped with Pd on (a)glass; (b) , and (c) , transformed into (right ordinate axis) according to Eq. (1), both as a function of time at 373 K. The resistances were measured by the van der Pauw method, with four silver paint contacts at the corners of a square sample, and with two different current directions for each data point. The resistances of the films on the three substrates before charging were .

Image of FIG. 10.
FIG. 10.

The integrated intensities as a function of time at 355 K of the main reflections of and Mg on (a) and Mg(002); (b) and Mg(002); and (c) (200). The (002) and (101) peaks of the regrown Mg on are too small to extract meaningful values. We have defined as the time at which of the film is .

Tables

Generic image for table
Table I.

The thickness of the Mg that transforms to after hydrogen absorption, and the thickness of the Mg that regrows epitaxially after hydrogen desorption, obtained from x-ray diffraction symmetric and rocking curve scans, for the four films described in the text. Values have been rounded off.

Loading

Article metrics loading...

/content/aip/journal/jap/101/11/10.1063/1.2736304
2007-06-08
2014-04-16
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Formation and dissociation of MgH2 in epitaxial Mg thin films
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/11/10.1063/1.2736304
10.1063/1.2736304
SEARCH_EXPAND_ITEM