Photoemission investigation of the electronic-structure changes in Zr-Ni-Cu metallic glasses upon hydrogenation

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Abstract

The electronic density of states (DOS) in the valence band of Zr50Ni50-xCux metallic glasses (x=10, 15, 17, and 20) and their hydrides was investigated by means of ultraviolet photoemission spectroscopy (UPS). In the spectra, one could distinguish Cu-, Ni-, and Zr-derived states both before and after hydrogenation. It was found that hydrogen markedly modified the states mainly in the region of Cu-derived states whereas the Ni- and Zr-derived states were affected to a lesser extent or in a different way by hydrogen. The effect of hydrogenation on the Cu-derived 3d valence-band states was ascribed to a hydrogen-induced phase separation as a result of which the Zr-Ni-Cu metallic glass transformed into a nanoscale mixture of Cu-rich clusters and copper-depleted Zr-Ni-Cu-H glassy hydride regions.

Original languageEnglish
Pages (from-to)7151-7158
Number of pages8
JournalPhysical Review B
Volume52
Issue number10
DOIs
Publication statusPublished - Jan 1 1995

ASJC Scopus subject areas

  • Condensed Matter Physics

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