01381nas a2200169   4500008004100000245005700041210005700098260001200155300001400167490000700181520085100188100002701039700002401066700002001090700002301110856007801133       2001                        eng d00aMixed Metal Films with Switchable Optical Properties0 aMixed Metal Films with Switchable Optical Properties  c02/2002  a1349-13510 v803 a<p>Thin, Pd-capped metallic films containing magnesium and first row transition metals (Mn, Fe, Co) switch reversibly from their initial reflecting state to visually transparent states when exposed to gaseous hydrogen or following reduction cathodic polarization in an alkaline electrolyte. Reversion to the reflecting state is achieved by exposure to air or by anodic polarization. The films were prepared by co-sputtering from one magnesium target and one manganese, iron, or cobalt target. Both the dynamic optical switching range and the speed of the transition depend on the magnesium-transition metal ratio. Infrared spectra of films in the transparent, hydrided (deuterided) states support the presence of the intermetallic hydride phases Mg<sub>3</sub>MnH<sub>7</sub>, Mg<sub>2</sub>FeH<sub>6</sub>, and Mg<sub>2</sub>CoH<sub>5</sub>.</p>1 aRichardson, Thomas, J.1 aSlack, Jonathan, L.1 aFarangis, Baker1 aRubin, Michael, D.  uhttps://facades.lbl.gov/publications/mixed-metal-films-switchable-optical