@article {11766,
	title = {Effect of Hydrogen Insertion on the Optical Properties of PD-Coated Magnesium Lanthanides},
	journal = {Electrochimica Acta},
	year = {1998},
	month = {9/1998},
	address = {London, U.K.},
	abstract = {<p>Metallic magnesium lanthanide thin films upon insertion of hydrogen transform to a highly transparent hydride phase. With a Pd overlayer, the transformation can be produced either by electrochemical insertion of hydrogen or by exposing the film to hydrogen gas. Unlike amorphous oxide electrochromics, the transformation is accompanied by a large change in visible reflectance (about 50\%). The optical switching effect in these materials is investigated in terms of changes in the complex refractive index as determined by variable-angle spectroscopic ellipsometric and normal-incidence radiometric measurements over the solar spectrum. Furthermore the optical effect of converting the Pd caplayer to Pd-H was determined. It is shown that the pd layer limits the visible transmittance of the hyrdrided stack to about 35-40\%. Whereas the extinction coefficient of the dehydrided LnMg-layers at 550 nm is between 2.2 and 3.1, it is as low as 10-4 in the transparent state.</p>},
	author = {Klaus von Rottkay and Michael D. Rubin and Franck Michalak and Robert D. Armitage and Thomas J. Richardson and Jonathan L. Slack and Peter A. Duine}
}
