Degradation of Switchable Mirror Based on Mg–Ni Alloy Thin Film

概要

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Palladium-capped magnesium–nickel switchable mirror thin films were prepared by DC magnetron sputtering, and their optical switching property using a hydrogen-containing gas was investigated. Although these films show excellent switching between metallic and transparent states initially, optical modulation range decreases with increasing number of switching cycles; it is reduced to 10% after 170 cycles. To study the degradation mechanism, the depth profile, electronic structure and surface morphology of the samples were determined. Photoelectron spectroscopy measurements revealed that the interface structure between palladium and magnesium–nickel layers was modified owing to repeated switchings. Electron microscope observations showed that the surface structure was markedly changed for the degraded sample.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2007-07-15