Sequence of structural and magnetic phase transitions in (NO)Mn6(NO3)13

Авторы: Vorobyova Anna A., Morozov Igor V., Vasilchikova Tatyana M., Zakharov Konstantin V., Ovchenkov Yevgeny A., Chistyakov Gregory D., Ivanova Anna G., Shvanskaya Larisa V., Lyssenko Konstantin A., Pchelkina Zlata V., Vasiliev Alexander N., Volkova Olga S.
Журнал: Inorganic Chemistry
Том: 63
Номер: 10
Год издания: 2024
Издательство: American Chemical Society
Местоположение издательства: United States
DOI: 10.1021/acs.inorgchem.4c00180
Аннотация: New nitrosonium manganese (II) nitrate, (NO)Mn6(NO3)13 have been synthesized and structurally characterized. In the temperature range of 45-298 K crystal is hexagonal (centrosymmetric sp. gr. P63/m). Mn+2 ions are assembled into tubes along axis c with both NO3- filling and coating. The nitrosonium cation is located in the framework cavity and is disordered by 3-fold axis. At the temperature TS1 = 190 K, a structural phase transition related to libration of inter-tube NO3 group and small variation of Mn polyhedron is observed. Moreover, the anomalies in physical properties of (NO)Mn6(NO3)13 allow suggesting that ordering of NO+ units occurs at low temperatures. The antiferromagnetic ordering in this compound is preceded by the formation of short-range correlation regime at about 25 K and takes place in two steps at TN1 = 12.0 K and TN2 = 8.4 K.
Добавил в систему: Воробьёва Анна Андреевна

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