Tunable reflectance Mg-Ni-H films

被引:44
作者
Isidorsson, J
Giebels, IAME
Griessen, R
Di Vece, M
机构
[1] Free Univ Amsterdam, Fac Sci, Div Phys & Astron, NL-1081 HV Amsterdam, Netherlands
[2] Uppsala Univ, SE-75121 Uppsala, Sweden
[3] Univ Utrecht, Debye Res Inst, NL-3508 TA Utrecht, Netherlands
关键词
D O I
10.1063/1.1463205
中图分类号
O59 [应用物理学];
学科分类号
摘要
Mg2NiHx switchable mirrors, which switch from shiny metallic Mg2Ni to transparent Mg2NiH4, are shown to exhibit also dramatic reversible changes in reflectance at remarkably low hydrogen concentrations. Already for xcongruent to0.3 a 232 nm thick Mg2NiHx film has an absorptance of similar to90% over the whole visible optical spectrum. The transition from highly reflective to black occurs in the concentration interval 0.1<x<0.3. The volume changes involved are one order of magnitude smaller than in the transition from reflecting to transparent. This is expected to enhance the lifetime of future devices based on these materials. (C) 2002 American Institute of Physics.
引用
收藏
页码:2305 / 2307
页数:3
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