X-ray photoelectron spectroscopic studies on coloration of SrLaAlO4 singlecrystals

Authors
Novosselov, A Pajaczkowska, A Talik, E
Citation
A. Novosselov et al., X-ray photoelectron spectroscopic studies on coloration of SrLaAlO4 singlecrystals, CRYST RES T, 36(8-10), 2001, pp. 859-864
Citations number
22
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CRYSTAL RESEARCH AND TECHNOLOGY
ISSN journal
02321300 → ACNP
Volume
36
Issue
8-10
Year of publication
2001
Pages
859 - 864
Database
ISI
SICI code
0232-1300(2001)36:8-10<859:XPSSOC>2.0.ZU;2-9
Abstract
An investigation of the X-ray photoelectron spectra of single crystals of S rLaAlO4 grown at various oxygen pressures is reported. Light yellow crystal s were obtained at pressure of oxygen lower than about 5x10(-4) atm while g reen colored crystals at oxygen pressure higher than 5x10(-3) atm. The obta ined 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 yell ow 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 onl y two the O 1s peaks defined as adsorbed oxygen and an oxygen of the unit c ell were found.