Structural phase transitions in the kagome lattice based materials Cs2−xRbxSnCu3F12 (x =0, 0.5, 1.0, 1.5)

Downie, L.J.; Black, C.; Ardashnikova, E.I.; Tang, C.C.; Vasiliev, A.N.; Golovanov, A.N.; Berdonosov, P.S.; Dolgikh, V.A.; Lightfoot, P.

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: 2 ноября 2014 г.

Авторы: Downie L.J., Black C., Ardashnikova E.I., Tang C.C., Vasiliev A.N., Golovanov A.N., Berdonosov P.S., Dolgikh V.A., Lightfoot P.
Журнал: CrystEngComm
Том: 16
Год издания: 2014
Издательство: Royal Society of Chemistry
Местоположение издательства: United Kingdom
Первая страница: 7419
Последняя страница: 7425
DOI: 10.1039/c4ce00788c
Аннотация: The solid solution Cs2-xRbxSnCu3F12 (x = 0, 0.5, 1.0, 1.5) has been investigated crystallographically between 100 and 300 K using synchrotron X-ray powder diffraction and, in the case of x = 0, neutron powder diffraction. For Cs2SnCu3F12 (x = 0), there is a structural transition from the previously reported room temperature rhombohedral symmetry (R-3m) to monoclinic (P21/n) symmetry at 170 K. This transformation is repeated for the x = 0.5 composition, but with an increased transition temperature of 250 K. For x = 1.0 the monoclinic phase is found at 300 K, suggesting that the transition temperature is increased even further. For x = 1.5 a different behaviour, more akin to that previously reported for Rb2SnCu3F12, is found: a single phase transition between rhombohedral symmetry (R-3) and triclinic symmetry (P-1) is found at 280 K. In agreement with previous single crystal studies, Cs2SnCu3F12 powder exhibits strong antiferromagnetic interactions (Theta ~ -268 K) and long-range magnetic order at TN ~ 19.3 K. The finite magnetic moment observed for T < TN might be explained by a Dzyaloshinskii–Moriya interaction, due to the lowering of symmetry from rhombohedral to monoclinic, which was not suggested in the earlier single crystal study.
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Structural phase transitions in the kagome lattice based materials Cs2−xRbxSnCu3F12 (x =0, 0.5, 1.0, 1.5)статья

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