Electronic structures of Pd30Pt17.5Cu32.5P20 bulk metallic glass

Shinya Hosokawa, Hitoshi Sato, Masashi Nakatake, Nobuyuki Nishiyama

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The incident-photon energy, hν, dependence of the valence-band electronic structure was measured by photoemission spectroscopy (PES) on Pd30Pt17.5Cu32.5P20 (PPCP) bulk metallic glass, having a critical-cooling-rate similar to that of the Pd42.5Ni7.5Cu30P20 (PNCP) excellent glass-former. The density of states (DOS) near the Fermi energy is mainly composed of the Pd 4d and Pt 5d electrons. The partial Pd 4d, Pt 5d, and Cu 3d DOSs in the valence band were estimated by the hν dependence of the photo-ionization cross-sections, and a localized tendency was clarified for the Pd 4d electrons. Core-level PES measurements were also carried out at the Pd 3d5/2, Pt 4f7/2, Cu 3p1/2, and P 2p levels. The Pd 3d5/2 core level largely shifts toward the deeper electron energies by replacing Ni with Pt atoms from PNCP, indicating a charge transfer from the P and Pd atoms. The width of the peak becomes wider in PPCP than in PNCP for the Pd 3d5/2 core level, suggesting that local structures around the Pd atoms become heterogeneous or less uniform.

Original languageEnglish
Pages (from-to)676-682
Number of pages7
JournalPhysica Status Solidi (B) Basic Research
Volume253
Issue number4
DOIs
Publication statusPublished - 2016 Apr 1

Keywords

  • Chemical states
  • Glass forming ability
  • Metallic glasses
  • Partial electronic density of states

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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