Optical transmission of magnesium hydride thin film with characteristic nanostructure

K. Yamamoto, K. Higuchi, H. Kajioka, H. Sumida, S. Orimo, H. Fujii

Research output: Contribution to journalConference articlepeer-review

46 Citations (Scopus)

Abstract

Optical and structural properties of rare-earth free and pure Mg thin film coated with Pd have been investigated. Optical examination indicates that the fully hydrogenated films are in a color-neutral transparent state. With increasing temperature up to 453 K in air, nontransparent scratch-like parts that correspond to dehydrogenated Mg precipitate in macroscopic scale, and their number gradually increases and grows sharply along specific orientations. The structural characterization indicates that the Mg layer is composed of epitaxial columnar grains whose widths are less than 100 nm with a c-axis preferred orientation for the Mg layer. The columnar grains are restructured to grains with 50-100 nm diameter during hydrogenation-dehydrogenation (optical switching) cycles.

Original languageEnglish
Pages (from-to)352-356
Number of pages5
JournalJournal of Alloys and Compounds
Volume330-332
DOIs
Publication statusPublished - 2002 Jan 17
Externally publishedYes
EventProceedings of the International Symposium on Metal-Hydrogen (MH 2000) - Noosa Heads, QLD, Australia
Duration: 2000 Oct 12000 Oct 6

Keywords

  • Hydrogen storage
  • Magnesium hydride
  • Nanostructure
  • Optical transmission
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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