Tunable reflectance Mg–Ni–H films

Isidorsson, J.; Giebels, I. A. M. E.; Griessen, R.; Di Vece, M.
April 2002
Applied Physics Letters;4/1/2002, Vol. 80 Issue 13, p2305
Academic Journal
Mg[sub 2]NiH[sub x] switchable mirrors, which switch from shiny metallic Mg[sub 2]Ni to transparent Mg[sub 2]NiH[sub 4], are shown to exhibit also dramatic reversible changes in reflectance at remarkably low hydrogen concentrations. Already for x ≅ 0.3 a 232 nm thick Mg[sub 2]NiH[sub x] film has an absorptance of ∼ 90% over the whole visible optical spectrum. The transition from highly reflective to black occurs in the concentration interval 0.1


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