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 - 1995

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Metallic glass
Photoemission
metallic glasses
Hydrogenation
hydrogenation
Electronic structure
Hydrogen
photoelectric emission
electronic structure
Valence bands
Hydrides
hydrides
hydrogen
valence
Electronic density of states
Photoelectron spectroscopy
Ultraviolet spectroscopy
Phase separation
Copper
copper

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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title = "Photoemission investigation of the electronic-structure changes in Zr-Ni-Cu metallic glasses upon hydrogenation",
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.",
author = "G. Pető and I. Bakonyi and K. Tompa and L. Guczi",
year = "1995",
doi = "10.1103/PhysRevB.52.7151",
language = "English",
volume = "52",
pages = "7151--7158",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Physical Society",
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TY - JOUR

T1 - Photoemission investigation of the electronic-structure changes in Zr-Ni-Cu metallic glasses upon hydrogenation

AU - Pető, G.

AU - Bakonyi, I.

AU - Tompa, K.

AU - Guczi, L.

PY - 1995

Y1 - 1995

N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevB.52.7151

DO - 10.1103/PhysRevB.52.7151

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JF - Physical Review B-Condensed Matter

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