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Sr2MgOsO6: A Frustrated Os6+ (5d2) Double Perovskite with Strong Antiferromagnetic Interactions

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Sarapulova,  Angelina
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Adler,  Peter
Peter Adler, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schnelle,  Walter
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Mikhailova,  Daria
Daria Mikhailova, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Felser,  Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Tjeng,  Liu Hao
Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Jansen,  Martin
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Sarapulova, A., Adler, P., Schnelle, W., Mikhailova, D., Felser, C., Tjeng, L. H., et al. (2015). Sr2MgOsO6: A Frustrated Os6+ (5d2) Double Perovskite with Strong Antiferromagnetic Interactions. Zeitschrift für anorganische und allgemeine Chemie, 641(5), 769-771. doi:10.1002/zaac.201500151.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0026-B646-0
Abstract
The Os6+ (t2g2) double perovskite Sr2MgOsO6 was prepared as polycrystalline material from the respective binary metal oxides. Sr2MgOsO6 crystallizes with the tetragonal space group I4/m. Magnetization and specific heat measurements show a broad anomaly near 100 K, but no well-defined cusp. The magnetism is governed by strong antiferromagnetic interactions. Sr2MgOsO6 constitutes a new example for the peculiar, poorly understood magnetism of 5d2 ions on a frustrated fcc lattice, where spin-orbit coupling and orbital physics are expected to play an important role.