Crystal and defect structure of Nd1.9Ce0.1CuO4 +/- y / Petrov AN,Zuev AY,Rodionova TP,Voronin VI // JOURNAL OF THE AMERICAN CERAMIC SOCIETY. - 1999. - V. 82, l. 4. - P. 1037-1044.

ISSN/EISSN:

0002-7820 / нет данных

Type:

Article

Abstract:

The crystal and defect structure of neodymium cerium cuprate (Nd1.9Ce0.1CuO4+/-y) has been studied as a function of temperature (1200-1500 K) and oxygen pressure (10(0)-10(-3) atm) via X-ray diffractometry, powder neutron diffraction, and thermogravimetry methods. The oxygen nonstoichiometry changes from oxygen-excess (positive y values) to oxygen-deficient oxides (negative y values), The absolute values of oxygen nonstoichiometry y are calculated from the neutron diffraction and thermogravimetry data. The materials adopt the tetragonal structure (space group I4/mmm). A defect model is proposed for Nd2-xCexCuO4+/-y. It is concluded that oxygen vacancies V-O(..) (which occupy O(1) crystallographic positions (in planes)) and interstitial oxygen O-i{''} (which occupy O(3) ``apical{''} positions) are present simultaneously. Gaseous oxygen intercalates into the Nd1.9Ce0.1CuO4+/-y crystals and replaces oxygen vacancies in the O(1) position and interstitial oxygen atoms in the O(3) positions. The theoretical model and the experimental data are in good agreement with each other, and the equilibrium constants of defect formation have been calculated.

Author keywords:

NEUTRON-DIFFRACTION; OXYGEN; ND1.85CE0.15CUO4-DELTA; CARRIERS; CE

DOI:

нет данных

Web of Science ID:

ISI:000079929000031

Соавторы в МНС:

—

Другие поля

Поле	Значение
Month	APR
Publisher	AMER CERAMIC SOC
Address	735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 USA
Language	English
Keywords-Plus	NEUTRON-DIFFRACTION; OXYGEN; ND1.85CE0.15CUO4-DELTA; CARRIERS; CE
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Ceramics
ResearcherID-Numbers	Zuev, Andrey/E-6220-2014 Voronin, Vladimir/J-7733-2013
ORCID-Numbers	Voronin, Vladimir/0000-0002-3901-9812
Number-of-Cited-References	13
Usage-Count-Since-2013	2
Journal-ISO	J. Am. Ceram. Soc.
Doc-Delivery-Number	189WK