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Novel magnetically frustrated manganese phosphate Mn2(PO4)OH with triploidite crystal structureтезисы доклада
- Авторы: Shvanskaya L.V., Yakubovich O.V., Dimitrova O.V., Volkova O.S., Vasiliev A.N.
- Сборник: Book of Abstracts of Moscow International Symposium on Magnetism (MISM-2017)
- Тезисы
- Год издания: 2017
- Место издания: Москва
- Первая страница: 300
- Аннотация: The manganese end member of triplite-triploidite series of compounds, Mn2(PO4)OH, is synthesized by hydrothermal method. Its crystal structure is refined in the space group P21c with a = 12.411(1) Å, b = 13.323(1) Å, c = 10.014(1) Å, beta = 108.16(1), V = 1573.3 Å3, Z = 8, R1 = 0.0375. Evidenced in measurements of magnetization M and specific heat Cp, Mn2(PO4)OH reaches long range antiferromagnetic order at TN = 4.6 K. As opposed to both triplite Mn2(PO4)F and triploidite Co2(PO4)F, the title compound is highly frustrated being characterized by the ratio of Curie-Weiss temperature Θ to Neel temperature TN of about 20. The large value of frustration strength strength |Θ|/TN ~ 3 stems from the twisted saw tooth chain geometry of corner sharing triangles of Mn polyhedra possible to isolate in tubular fragments of triploidite crystal structure.
- Добавил в систему: Шванская Лариса Викторовна