Abstract
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 x>0.3 a 232 nm thick Mg2NiHx 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,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.
Original language | English |
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Pages (from-to) | 2305-2307 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 80 |
Issue number | 13 |
DOIs | |
Publication status | Published - 2002 |