Structural and Electronic Properties of Magnesium-3D Transition Metal Switchable Mirrors

Publication Type

Conference Paper

Date Published

12/2002

LBNL Report Number

LBNL-51415

Abstract

We have observed reversible mirror-to-transparent state switching in a variety of mixed metal thin films containing magnesium and first-row transition elements including Ni, Fe, Co, Mn, and Ti. The very large changes in both reflectance and transmittance on loading these films with hydrogen are accompanied by significant structural and electronic transformations. The valence states and coordination of metal atoms during hydrogen loading were followed using dynamic in situ transmissionmode X-ray absorption spectroscopy. Time-resolved Mg K-edge and Ni, Co, Mn, and Ti L-edge spectra reflect both reversible and irreversible changes in the metal environments. These spectra are compared to those of reference materials and to predictions from calculations.

Conference Name

Fifth International Meeting on Electrochromism

Year of Publication

2002

Conference Location

Golden, CO