Crystal structure and oxygen nonstoichiometry of the HoxSr1-xCoO3-delta / Cherepanov Vladimir A.,Gavrilova Ludmila Ya,Volkova Nadezhda E.,Aksenova Tatyana V. // JOURNAL OF MATERIALS RESEARCH. - 2012. - V. 27, l. 15. - P. 2030-2034.

ISSN/EISSN:

0884-2914 / нет данных

Type:

Article

Abstract:

Samples with overall composition HoxSr1-xCoO3-delta within the range 0.05 <= x <= 0.9 were prepared by a solid-state technique at 1100 degrees C in air. Single-phase HoxSr1-xCoO3-delta oxides were obtained within the range 0.05 <= x <= 0.30. Solid solutions of Ho0.05Sr0.95CoO3-delta and Ho0.1Sr0.9CoO3-delta were indexed in the cubic structure (Pm3m sp. gr.) with the unit cell parameters a = 3.846 angstrom and a = 3.842 angstrom, respectively. Further introduction of holmium leads to a change of crystal structure from cubic to a tetragonal 2a(p) x 2a(p) x 4a(p) superstructure. All samples with x > 0.3 were multiphase, containing a saturated solid solution with approximate composition Ho0.3Sr0.7CoO3-delta with Ho2O3 and CoO. The change of oxygen nonstoichiometry was measured by thermogravimetric analysis within the temperature range 25 <= T (degrees C) <= 1100. The absolute value of oxygen nonstoichiometry was calculated from the results of chromatometric titration. Thermal expansion coefficients of Ho1-xSrxCoO3-delta were measured by dilatometry within the temperature range 25 <= T (degrees C) <= 1100 in air.

Author keywords:

MAGNETIC-PROPERTIES; LN; PEROVSKITES; CELLS; Y3+; HO; DY

DOI:

10.1557/jmr.2012.159

Web of Science ID:

ISI:000307214700016

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG
Publisher	CAMBRIDGE UNIV PRESS
Address	32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
Language	English
Keywords-Plus	MAGNETIC-PROPERTIES; LN; PEROVSKITES; CELLS; Y3+; HO; DY
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Multidisciplinary
Author-Email	vladimir.cherepanov@usu.ru
ResearcherID-Numbers	Cherepanov, Vladimir/E-6451-2014
ORCID-Numbers	Cherepanov, Vladimir/0000-0003-3653-6459
Funding-Acknowledgement	Ministry of Education and Science of Russian Federation
Funding-Text	This work was financially supported in parts by the Ministry of Education and Science of Russian Federation within the Federal Target Program ``Investigations and researchers on the priority directions of development for the scientific and technological complex of Russia in 2007-2013.{''}
Number-of-Cited-References	17
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	16
Journal-ISO	J. Mater. Res.
Doc-Delivery-Number	984TL