X-ray photoelectron spectroscopy studies of PrAlO3 crystals before and after thermal treatment

• Autorzy: Kruczek M. , Talik E. , Pawlak D. , Łukasiewicz T.
• Konferencja: Surface Physics and Thin-Films Structure Seminar ; 17-21.05.2005 ; Szklarska Poręba, Poland
• Języki publikacji: EN

Abstrakty

EN

The as-grown PrA103 single crystals grown by the Czochralski method are brown colored and after annealing in the reducing atmosphere (20%) H2/N2 they change the color to green. The X-ray photoelectron spectroscopy was used to study the chemical composition and electronic structure of PrAlO3 single crystals before and after the thermal treatment. The core electron lines of praseodymium, aluminum and oxygen were measured and deconvoluted into the synthetic peaks to determine the chemical shifts. The mixed ionic and covalent character of bonds was found. The praseodymium valency may influence the coloration of the PrAlO3 crystal. In the as-grown sample an additional Pr 3d3/2 peak at about 965 eV has higher intensity than that in the annealed one and is attributed to the presence of Pr⁴⁺ ions. The measurements showed the reduction of oxygen during thermal treatment and that interstitial oxygen was not removed in this process.

Słowa kluczowe

EN

characterization; praseodymium compounds; perovskites; oxides

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2005
• Tom: Vol. 35, nr 3
• Strony: 347--328
• Opis fizyczny: Bibliogr. 20 poz., wykr.

Twórcy

autor

Kruczek M.

• Institute of Physics, University of Silesia, Bankowa 12, 40-007 Katowice, Poland
• Electronic Materials Technology, Wólczynska 133, 01-919 Warszawa, Poland

autor

Talik E.

• Institute of Physics, University of Silesia, Bankowa 12, 40-007 Katowice, Poland

autor

Pawlak D.

• Electronic Materials Technology, Wólczynska 133, 01-919 Warszawa, Poland

autor

Łukasiewicz T.

• Electronic Materials Technology, Wólczynska 133, 01-919 Warszawa, Poland

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