X-ray emission study of the electronic structure of nanocrystalline Al2O3 / Zatsepin DA,Cherkashenko VM,Kurmaev EZ,Shamin SN,Fedorenko VV,Skorikov NA,Plastinin SV,Gavrilov NV,Medvedev AI,Cholakh SO // PHYSICS OF THE SOLID STATE. - 2004. - V. 46, l. 11. - P. 2134-2138.

ISSN/EISSN:

1063-7834 / нет данных

Type:

Article

Abstract:

Valence states of metal ions and the phase composition of nanocrystalline Al2O3 (of the original oxide and the oxide irradiated by high-energy Fe+ ions) are studied by using x-ray emission Al L-2,L- 3 and O Kalpha spectra. It is established that the shape of the Al L-2,L- 3 spectra strongly changes as one goes from the original (bulk) Al2O3 to nanocrystalline oxide, while the O Kalpha spectra remain practically unchanged. Moreover, irradiation by high-energy Fe+ ions results in slight additional changes in the x-ray spectral characteristics of the aluminum oxides under study. The obtained experimental data are compared with the results of theoretical calculations of the electronic structure of alpha and gamma phases of Al2O3 performed using the LDA formalism. Using the results of x-ray spectral studies, electronic structure calculations, and x-ray diffraction analysis, it is shown that the revealed spectral differences between the nanocrystalline state of aluminum oxide and the bulk material can be interpreted as a phase transition from the alpha phase to the gamma phase of Al2O3 with an addition of bayerite. (C) 2004 MAIK ``Nauka/Interperiodica{''}.

Author keywords:

ALUMINUM; SPECTROSCOPY; ALPHA-AL2O3; OXIDE; CUO; MGO

DOI:

10.1134/1.1825561

Web of Science ID:

ISI:000225042800026

Соавторы в МНС:

Другие поля

Поле	Значение
Publisher	AMER INST PHYSICS
Address	CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Language	English
Keywords-Plus	ALUMINUM; SPECTROSCOPY; ALPHA-AL2O3; OXIDE; CUO; MGO
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	d\_zatsepin@ifmlrs.uran.ru
ResearcherID-Numbers	Kurmaev, Ernst/J-4254-2013 Zatsepin, Dmitry/F-5520-2012 Cholakh, Seif/M-8221-2016 Shamin, Sergey/K-2922-2013 Skorikov, Nikolay/A-6728-2012
ORCID-Numbers	Kurmaev, Ernst/0000-0003-4625-4930 Cholakh, Seif/0000-0002-9313-6614 Shamin, Sergey/0000-0001-8213-5926 Skorikov, Nikolay/0000-0002-3771-8708 Gavrilov, Nikolai/0000-0003-1542-0107
Number-of-Cited-References	15
Usage-Count-Since-2013	8
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	870FK