|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Slicing the Perovskite Structure with Crystallographic Shear Planes: The A(n)B(n)O(3n-2) Homologous Seriesстатья
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 Artem M., Hadermann Joke, Batuk Maria, D'Hondt Hans, Tyablikov Oleg A., Rozova Marina G., Pokholok Konstantin V., Filimonov Dmitry S., Sheptyakov Denis V., Alexander A Tsirlin, Niermann Daniel, Hemberger Joachim, Van Tendeloo Gustaaf, Antipov Evgeny V.
- Журнал: Inorganic Chemistry
- Том: 49
- Номер: 20
- Год издания: 2010
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 9508
- Последняя страница: 9516
- DOI: 10.1021/ic101233s
- Аннотация: A new A(n)B(n)O(3-n) homologous series of anion-deficient perovskites has been evidenced by preparation of the members with n = 5 (Pb2.9Ba2.1Fe4TiO13) and n = 6 (Pb3.8Bi0.2Ba2Fe4.2Ti1.8O16) in a single phase form. The crystal structures of these compounds were determined using a combination of transmission electron microscopy and X-ray and neutron powder diffraction (S.G. Ammm, a= 5.74313(7), b= 3.98402(4), c= 26.83780(4) angstrom, R-I= 0.035, R-P = 0.042 for Pb2.9Ba2.1Fe4TiO13 and S.G. Imma, a = 5.7199(1), b = 3.97066(7), c = 32.5245(8) angstrom, R-I = 0.032, R-P = 0.037 for Pb3.813i0,2Ba2Fe4,2Ti1.8016). The crystal structures of the A(n)B(n)O(3n-2) homologues are formed by slicing the perovskite structure with (101)p crystallographic shear (CS) planes. The shear planes remove a layer of oxygen atoms and displace the perovskite blocks with respect to each other by the 1/2[110](p) vector. The CS planes introduce edgesharing connections of the transition metal oxygen polyhedra at the interface between the perovskite blocks. This results in intrinsically frustrated magnetic couplings between the perovskite blocks due to a competition of the exchange interactions between the edge- and the corner-sharing metal oxygen polyhedra. Despite the magnetic frustration, neutron powder diffraction and Mossbauer spectroscopy reveal that Pb2.9Ba2.1Fe4TiO13 and Pb3.8Bi0.2Ba2Fe4.2Ti1.8O16 are antiferromagnetically ordered below TN = 407 and 343 K, respectively. The Pb2.9Ba2.1Fe4TiO13 and Pb3.8Bi0.2Ba2Fe4.2Ti1.8O16 compounds are in a paraelectric state in the 5-300 K temperature range.
- Добавил в систему: Розова Марина Геннадьевна