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Synthesis and crystal structure of novel CaRMnSnO6 (R = La, Pr, Nd, Sm-Dy) double perovskitesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Abakumov A.M., Rossell M.D., Seryakov S.A., Rozova M.G., Markina M.M., Van Tendeloo G., Antipov E.V.
- Журнал: Journal of Materials Chemistry
- Том: 15
- Номер: 46
- Год издания: 2005
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 4899
- Последняя страница: 4905
- DOI: 10.1039/b510242a
- Аннотация: The CaRMnSnO6 (R = La, Pr, Nd, Sm-Dy) double perovskites were prepared using a solid state reaction in evacuated sealed silica tubes at 1050-1100 degrees C. All compounds belong to the GdFeO3-type structure (orthorhombic a : b : c approximate to root 2a(p) : 2a(p) : root 2a(p) unit cell, space group Pnma, (a(+)b(-)b(-)) tilt system). The crystal structures were investigated by electron diffraction and high resolution electron microscopy and were refined from X-ray powder diffraction data for the R = La, Sm, Dy representatives (La: R-I=0.030, R-P=0.033; Sm: R-I=0.030, R-P=0.010; Dy: R-I=0.033, R-P=0.010). A disordered arrangement of the Ca and R cations over the A positions and Mn and Sn cations over the B positions was found in all cases. The small difference in charge and size between the Mn3+ and Sn4+ cations, the small degree of Jahn-Teller deformation of the MnO6 octahedra, and the ac-plane orbital ordering type were proposed as possible reasons for the cation disorder on the B sublattice. The compounds demonstrate a spin glass behavior in the temperature range from 25 to 300 K.
- Добавил в систему: Маркина Мария Михайловна