| Autor: |
Vorobyova AA; National University of Science and Technology 'MISiS', Moscow 119049, Russia.; Higher School of Economics, Moscow 101000, Russia., Morozov IV; National University of Science and Technology 'MISiS', Moscow 119049, Russia.; Lomonosov Moscow State University, Moscow 119991, Russia., Vasilchikova TM; National University of Science and Technology 'MISiS', Moscow 119049, Russia.; Lomonosov Moscow State University, Moscow 119991, Russia., Zakharov KV; Lomonosov Moscow State University, Moscow 119991, Russia., Ovchenkov YA; Lomonosov Moscow State University, Moscow 119991, Russia., Chistyakov GD; Lomonosov Moscow State University, Moscow 119991, Russia., Ivanova AG; FSRC 'Crystallography and Photonics' RAS, Moscow 119333, Russia., Shvanskaya LV; National University of Science and Technology 'MISiS', Moscow 119049, Russia.; Lomonosov Moscow State University, Moscow 119991, Russia., Lyssenko KA; Lomonosov Moscow State University, Moscow 119991, Russia., Pchelkina Z; Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, Ekaterinburg 620108, Russia.; Theoretical Physics and Applied Mathematics Department, Ural Federal University, Ekaterinburg 620002, Russia., Vasiliev AN; National University of Science and Technology 'MISiS', Moscow 119049, Russia., Volkova OS; National University of Science and Technology 'MISiS', Moscow 119049, Russia. |
| Abstrakt: |
New nitrosonium manganese(II) nitrate, (NO)Mn 6 (NO 3 ) 13 , has been synthesized and structurally characterized. In the temperature range of 45-298 K, the crystal is hexagonal (centrosymmetric sp. gr. P 6 3 / m ). Mn 2+ ions are assembled into tubes along axis c with both NO 3 - filling and coating. The nitrosonium cation is located in the framework cavity and is disordered by a 3-fold axis. At the temperature T S1 = 190 K, a structural phase transition related to the libration of the intertube NO 3 group and a small variation of Mn polyhedron is observed. Moreover, the anomalies in physical properties of (NO)Mn 6 (NO 3 ) 13 allow suggesting that ordering of NO + units occurs at low temperatures. The antiferromagnetic ordering in this compound is preceded by the formation of a short-range correlation regime at about 25 K and takes place in two steps at T N1 = 12.0 K and T N2 = 8.4 K. |
