Optical transmission spectroscopy of switchable yttrium hydride films

M. Kremers, N.J. Koeman, R. Griessen, P.H.L. Notten, R. Tolboom, Paul J. Kelly, P.A. Duine

Research output: Contribution to journalArticleAcademicpeer-review

117 Citations (Scopus)

Abstract

The optical transmission of the recently discovered switchable yttrium hydride films is determined spectroscopically as a function of hydrogen content. This is done during electrochemical loading of Pd-capped Y film electrodes, thereby continuously changing the hydrogen concentration. The effect of the Pd cap layer on the film transmission is determined from measurements on a series of films with varying Pd layer thickness. The results are in good agreement with transmission measurements of in situ gas phase loaded, uncapped Y films. Both data sets can be consistently described with simple optical decay lengths such as 277.8 nm for YH3−δ and 15.1 nm for Pd at ħω=1.96 eV. The hydrogen concentration dependence of the optical transmission is discussed and compared with previous optical measurements on bulk samples and band-structure calculations.
Original languageEnglish
Pages (from-to)4943-4949
Number of pages7
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume57
Issue number8
DOIs
Publication statusPublished - 1998

Keywords

  • METIS-129112

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