Trigonal layered rosiaite-related antiferromagnet MnSnTeO6: ionexchange preparation, structure and magnetic properties

Авторы: Nalbandyan V.B., Evstigneeva M.A., Vasilchikova T.M., Bukhteev K.Yu, Vasiliev A.N., Zvereva E.A.
Журнал: Dalton Transactions
Год издания: 2018
Издательство: Royal Society of Chemistry
Местоположение издательства: United Kingdom
DOI: 10.1039/C8DT03329C
Аннотация: Ion-exchange treatment of Na2SnTeO6 in molten salt mixtures resulted in rosiaite (PbSb2O6)-related MnSnTeO6. Its crystal structure was refined by the Rietveld method. Of the three possible models of Sn/Te distribution, the disordered model ((P3 ̅1m, a = 5.23093(11) Å, c = 4.62430(16) Å) was preferred based on bond distances. However, it is supposed that each individual (SnTeO6)2- layer retains complete ordering of the precursor and the apparent disorder is only due to stacking faults. The magnetic studies have shown that MnSnTeO6 orders antiferromagnetically at Neél temperature TN = 9.8 K. The effective magnetic moment reasonably agrees with theoretical estimations assuming high-spin configuration of Mn2+ (S = 5/2). Electron spin resonance reveals spin dynamics in accordance with aniferromagnetic ordering with critical broadening of ESR linewidth indicating the low-dimentional type of exchange interactions. Based on the temperature and field-dependent magnetization studies, the magnetic phase diagram of the new compound was constructed.
Добавил в систему: Зверева Елена Алексеевна

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