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Crystal structures and variable magnetism of PbCu2(XO3)2Cl2 with X = Se, Teстатья
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: 25 сентября 2013 г.
- Авторы: Berdonosov Peter S., Oleg Janson, Olenev Andrei V., Krivovichev Sergey V., Helge Rosner, Dolgikh Valery A., Tsirlin Alexander A.
- Журнал: Dalton Transactions
- Том: 42
- Год издания: 2013
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 9547
- Последняя страница: 9554
- DOI: 10.1039/C3DT50426C
- Аннотация: Novel Cu2+-based compounds PbCu2(SeO3)2Cl2 (space group C2/c; a = 13.056(1) Å; b = 9.5567(9) Å; c = 6.9006(6) Å; β = 90.529(7)°; RI = 0.0371) and PbCu2(TeO3)2Cl2 (space group P21; a = 7.2401(2) Å; b = 7.2688(2) Å; c = 8.2846(2) Å; β = 96.416(2)°; RI = 0.0570) have been obtained by solid-state synthesis. Their crystal structures are remarkably dissimilar and underlie a very different magnetic behavior. While PbCu2(SeO3)2Cl2 can be well described by a spin-chain model with an exchange coupling of J1 [similar, equals] 160 K, PbCu2(TeO3)2Cl2 is a spin-dimer system that, however, features a comparable magnetic nearest-neighbor coupling of J [similar, equals] 213 K. PbCu2(SeO3)2Cl2 orders antiferromagnetically below 12 K, whereas PbCu2(TeO3)2Cl2 lacks long-range magnetic order down to at least 2 K, owing to the strong dimerization of the Cu2+ spins. Crystal structures of both compounds are rationalized in terms of relevant magnetic exchange pathways, and the implications for a broader range of Cu2+ compounds are discussed.
- Добавил в систему: Бердоносов Петр Сергеевич