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Introducing a Magnetic Guest to a Tetrel-Free Clathrate: Synthesis, Structure, and Properties of EuxBa8-xCu16P30 (0 <= x <= 1.5)статья
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: Kovnir Kirill, Stockert Ulrike, Budnyk Sergij, Prots Yurii, Baitinger Michael, Paschen Silke, Shevelkov Andrei V., Grin Yuri
- Журнал: Inorganic Chemistry
- Том: 50
- Номер: 20
- Год издания: 2011
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 10387
- Последняя страница: 10396
- DOI: 10.1021/ic201474h
- Аннотация: The europium-containing clathrate-I EuxBa8-xCu16P30 was synthesized from the elements. Powder X-ray diffraction in combination with energy dispersive X-ray absorption spectroscopy (EDXS) and metallographic studies showed the homogeneity range with x <= 1.5. Determination of the crystal structure confirmed the presence of an orthorhombic superstructure of clathrate-I and revealed that Eu atoms exclusively resided in small pentagonal-dodecahedral cages. Magnetic measurements together with X-ray absorption spectroscopy are consistent with a 4f(7) (Eu2+) ground state for EuxBa8-xCu16P30. Below 3 K the Eu moments order antiferromagnetically. Resistivity measurements revealed metallic behavior of the investigated clathrate, in line with the composition deviating from the Zintl counting scheme. Local vibrations of the guest atoms inside the cages are analyzed with the help of specific heat investigations.
- Добавил в систему: Шевельков Андрей Владимирович