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X-ray Photoelectron Spectroscopic Studies on Colorationof SrLaAlO4 Single Crystals

✍ Scribed by A. Novosselov; A. Pajaczkowska; E. Talik

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 292 KB
Volume: 36
Category: Article
ISSN: 0232-1300
DOI: 10.1002/1521-4079(200110)36:8/10<859::aid-crat859>3.0.co;2-s

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✦ Synopsis

An investigation of the X-ray photoelectron spectra of single crystals of SrLaAlO 4 grown at various oxygen pressures is reported. Light yellow crystals were obtained at pressure of oxygen lower than about 5×10 -4 atm while green colored crystals at oxygen pressure higher than 5×10 -3 atm. The obtained X-ray photoelectron spectra of Sr, La and Al ions show no significant difference while clearly seen difference in the O 1s spectra for light yellow and green crystals was found. The O 1s spectra of green crystals can be split into three superposed spectra assigned to absorbed oxygen, an oxygen in the unit cell and an interstital oxygen. As for light yellow crystal only two the O 1s peaks defined as adsorbed oxygen and an oxygen of the unit cell were found.

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