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Electronic structures of Pd 30 Pt 17.5 Cu 32.5 P 20 bulk metallic glass
Author(s) -
Hosokawa Shinya,
Sato Hitoshi,
Nakatake Masashi,
Nishiyama Nobuyuki
Publication year - 2016
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201552553
Subject(s) - fermi level , atomic physics , electron , electronic structure , metal , valence (chemistry) , core electron , density of states , photoemission spectroscopy , ionization , materials science , spectroscopy , ionization energy , x ray photoelectron spectroscopy , chemistry , condensed matter physics , ion , physics , nuclear magnetic resonance , computational chemistry , nuclear physics , organic chemistry , quantum mechanics , metallurgy
Abstractauthoren The incident‐photon energy, h ν , dependence of the valence‐band electronic structure was measured by photoemission spectroscopy (PES) on Pd30 Pt17.5 Cu32.5 P20 (PPCP) bulk metallic glass, having a critical‐cooling‐rate similar to that of the Pd42.5 Ni7.5 Cu30 P20 (PNCP) excellent glass‐former. The density of states (DOS) near the Fermi energy is mainly composed of the Pd 4 d and Pt 5 d electrons. The partial Pd 4 d , Pt 5 d , and Cu 3 d DOSs in the valence band were estimated by the h ν dependence of the photo‐ionization cross‐sections, and a localized tendency was clarified for the Pd 4 d electrons. Core‐level PES measurements were also carried out at the Pd 3 d 5 / 2 , Pt 4 f 7 / 2 , Cu 3 p 1 / 2 , and P 2 p levels. The Pd 3 d 5 / 2core 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 3 d 5 / 2core level, suggesting that local structures around the Pd atoms become heterogeneous or less uniform.