A photoemission study of ultrathin uranium layers on noble metals

Shin Ichi Fujimori; Yasuharu Saito; Takeo Ejima; Noriaki Sato; Takemi Komatsubara; Satoru Kunii; Shoji Suzuki; Shigeru Sato; Takehiko Ishii

doi:10.1016/s0368-2048(96)80050-8

A photoemission study of ultrathin uranium layers on noble metals

Shin Ichi Fujimori, Yasuharu Saito, Takeo Ejima, Noriaki Sato, Takemi Komatsubara, Satoru Kunii, Shoji Suzuki, Shigeru Sato, Takehiko Ishii

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Abstract

The core levels and valence states of ultrathin uranium layers on gold and nickel substrates have been studied using XPS. Uranium coverage was less than 2.8Å which corresponds to less than one monolayer. The spectral features are very similar to those of intermetallic compounds of uranium and gold or nickel. This indicates intermixing of deposited uranium with the substrates, at room temperature. In both U/Au and U/Ni systems, the main lines of U 4f spectra are quite asymmetric, and exhibit satellites at higher binding energies compared to the main lines. The profiles of the satellites are different in U/Au and U/Ni, reflecting the difference of the hybridization between U 5f and valence electrons of substrates.

Original language	English
Pages (from-to)	155-158
Number of pages	4
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	78
DOIs	https://doi.org/10.1016/s0368-2048(96)80050-8
Publication status	Published - 1996 May

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Radiation
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry

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10.1016/s0368-2048(96)80050-8

Cite this

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title = "A photoemission study of ultrathin uranium layers on noble metals",

abstract = "The core levels and valence states of ultrathin uranium layers on gold and nickel substrates have been studied using XPS. Uranium coverage was less than 2.8{\AA} which corresponds to less than one monolayer. The spectral features are very similar to those of intermetallic compounds of uranium and gold or nickel. This indicates intermixing of deposited uranium with the substrates, at room temperature. In both U/Au and U/Ni systems, the main lines of U 4f spectra are quite asymmetric, and exhibit satellites at higher binding energies compared to the main lines. The profiles of the satellites are different in U/Au and U/Ni, reflecting the difference of the hybridization between U 5f and valence electrons of substrates.",

author = "Fujimori, {Shin Ichi} and Yasuharu Saito and Takeo Ejima and Noriaki Sato and Takemi Komatsubara and Satoru Kunii and Shoji Suzuki and Shigeru Sato and Takehiko Ishii",

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doi = "10.1016/s0368-2048(96)80050-8",

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pages = "155--158",

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T1 - A photoemission study of ultrathin uranium layers on noble metals

AU - Fujimori, Shin Ichi

AU - Saito, Yasuharu

AU - Ejima, Takeo

AU - Sato, Noriaki

AU - Komatsubara, Takemi

AU - Kunii, Satoru

AU - Suzuki, Shoji

AU - Sato, Shigeru

AU - Ishii, Takehiko

PY - 1996/5

Y1 - 1996/5

N2 - The core levels and valence states of ultrathin uranium layers on gold and nickel substrates have been studied using XPS. Uranium coverage was less than 2.8Å which corresponds to less than one monolayer. The spectral features are very similar to those of intermetallic compounds of uranium and gold or nickel. This indicates intermixing of deposited uranium with the substrates, at room temperature. In both U/Au and U/Ni systems, the main lines of U 4f spectra are quite asymmetric, and exhibit satellites at higher binding energies compared to the main lines. The profiles of the satellites are different in U/Au and U/Ni, reflecting the difference of the hybridization between U 5f and valence electrons of substrates.

AB - The core levels and valence states of ultrathin uranium layers on gold and nickel substrates have been studied using XPS. Uranium coverage was less than 2.8Å which corresponds to less than one monolayer. The spectral features are very similar to those of intermetallic compounds of uranium and gold or nickel. This indicates intermixing of deposited uranium with the substrates, at room temperature. In both U/Au and U/Ni systems, the main lines of U 4f spectra are quite asymmetric, and exhibit satellites at higher binding energies compared to the main lines. The profiles of the satellites are different in U/Au and U/Ni, reflecting the difference of the hybridization between U 5f and valence electrons of substrates.

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JO - Journal of Electron Spectroscopy and Related Phenomena

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A photoemission study of ultrathin uranium layers on noble metals

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