DIRECT OBSERVATION OF LaB//6(001) SURFACE AT HIGH TEMPERATURES BY X-RAY AND ULTRAVIOLET PHOTOELECTRON SPECTROSCOPY, LOW-ENERGY ELECTRON DIFFRACTION, AUGER ELECTRON SPECTROSCOPY, AND WORK-FUNCTION MEASUREMENTS.

M. Aono; R. Nishitani; C. Oshima; T. Tanaka; E. Bannai; S. Kawai

doi:10.1063/1.326542

DIRECT OBSERVATION OF LaB//6(001) SURFACE AT HIGH TEMPERATURES BY X-RAY AND ULTRAVIOLET PHOTOELECTRON SPECTROSCOPY, LOW-ENERGY ELECTRON DIFFRACTION, AUGER ELECTRON SPECTROSCOPY, AND WORK-FUNCTION MEASUREMENTS.

M. Aono^*, R. Nishitani, C. Oshima, T. Tanaka, E. Bannai, S. Kawai

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

The properties of the LaB//6(001) surface which is in equilibrium with oxygen (ultrahigh vacuum - 10** minus **6 Torr) at high temperatures (room temperature about 1500 degree C) have been studied by XPS, UPS, LEED, AES, work-function measurements, and so on. In the case of the clean surface (experiments under ultrahigh vacuum), the chemical composition of the surface does not change up to about 1500 degree C. Under an oxygen atmosphere, the surface is covered by an oxide and has a high work function below a critical temperature T//c which depends on the oxygen pressure P//O//2. Above T//c, the surface oxide, which is rich in lanthanum content, evaporates, and the chemical composition and work function of the surface become identical to those of the clean surface under ultrahigh vacuum.

Original language	English
Pages (from-to)	4802-4807
Number of pages	6
Journal	Journal of Applied Physics
Volume	50
Issue number	7
DOIs	https://doi.org/10.1063/1.326542
Publication status	Published - 1979 Jul

ASJC Scopus subject areas

Physics and Astronomy(all)
Physics and Astronomy (miscellaneous)

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DIRECT OBSERVATION OF LaB//6(001) SURFACE AT HIGH TEMPERATURES BY X-RAY AND ULTRAVIOLET PHOTOELECTRON SPECTROSCOPY, LOW-ENERGY ELECTRON DIFFRACTION, AUGER ELECTRON SPECTROSCOPY, AND WORK-FUNCTION MEASUREMENTS. / Aono, M.; Nishitani, R.; Oshima, C. et al.
In: Journal of Applied Physics, Vol. 50, No. 7, 07.1979, p. 4802-4807.

Research output: Contribution to journal › Article › peer-review

Aono, M, Nishitani, R, Oshima, C, Tanaka, T, Bannai, E & Kawai, S 1979, 'DIRECT OBSERVATION OF LaB//6(001) SURFACE AT HIGH TEMPERATURES BY X-RAY AND ULTRAVIOLET PHOTOELECTRON SPECTROSCOPY, LOW-ENERGY ELECTRON DIFFRACTION, AUGER ELECTRON SPECTROSCOPY, AND WORK-FUNCTION MEASUREMENTS.', Journal of Applied Physics, vol. 50, no. 7, pp. 4802-4807. https://doi.org/10.1063/1.326542

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title = "DIRECT OBSERVATION OF LaB//6(001) SURFACE AT HIGH TEMPERATURES BY X-RAY AND ULTRAVIOLET PHOTOELECTRON SPECTROSCOPY, LOW-ENERGY ELECTRON DIFFRACTION, AUGER ELECTRON SPECTROSCOPY, AND WORK-FUNCTION MEASUREMENTS.",

abstract = "The properties of the LaB//6(001) surface which is in equilibrium with oxygen (ultrahigh vacuum - 10** minus **6 Torr) at high temperatures (room temperature about 1500 degree C) have been studied by XPS, UPS, LEED, AES, work-function measurements, and so on. In the case of the clean surface (experiments under ultrahigh vacuum), the chemical composition of the surface does not change up to about 1500 degree C. Under an oxygen atmosphere, the surface is covered by an oxide and has a high work function below a critical temperature T//c which depends on the oxygen pressure P//O//2. Above T//c, the surface oxide, which is rich in lanthanum content, evaporates, and the chemical composition and work function of the surface become identical to those of the clean surface under ultrahigh vacuum.",

author = "M. Aono and R. Nishitani and C. Oshima and T. Tanaka and E. Bannai and S. Kawai",

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DIRECT OBSERVATION OF LaB//6(001) SURFACE AT HIGH TEMPERATURES BY X-RAY AND ULTRAVIOLET PHOTOELECTRON SPECTROSCOPY, LOW-ENERGY ELECTRON DIFFRACTION, AUGER ELECTRON SPECTROSCOPY, AND WORK-FUNCTION MEASUREMENTS.

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