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Competing ferro- and antiferromagnetic interactions in (manganese,sodium)phenylsilsesquioxane with metal oxide fragments |
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| Authors: | M. M. Levitsky A. N. Bilyachenko M. S. Dronova A. I. Dmitriev R. B. Morgunov E. S. Shubina A. D. Kirilin |
| Affiliation: | 1. A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 ul. Vavilova, 119991, Moscow, Russian Federation 2. M. V. Lomonosov Moscow State Academy of Fine Chemical Technology, 86 prosp. Vernadskogo, 119571, Moscow, Russian Federation 3. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 prosp. Akad. Semenova, 142432, Chernogolovka, Moscow Region, Russian Federation |
| Abstract: | Magnetic measurements of individual (manganese,sodium)phenylsilsesquioxane containing eight MnII ions were performed. The magnetic arrangement of manganese ions in this cage-like compound was investigated. The magnetic moment of the cage molecule equals 21 μB (at 300 K), that is a consequence of the mutual antiferromagnetic compensation of four MnII ions, whereas the other four MnII ions have aligned spins. Hence, this metallasiloxane is a promising compound for the chemical design of molecular nanomagnets. At low temperatures, the antiferromagnetic coupling causes a decrease in the effective magnetic moment (to 16 μB at 40 K). |
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