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  Synthesis, crystal structure, and magnetic properties of Ba3Os2O9: A new osmate with Cs3Tl2Cl9-type structure

Feng, H. L., Geibel, C., & Jansen, M. (2017). Synthesis, crystal structure, and magnetic properties of Ba3Os2O9: A new osmate with Cs3Tl2Cl9-type structure. Journal of Solid State Chemistry, 249, 15-20. doi:10.1016/j.jssc.2017.02.012.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-3CB0-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C3BA-6
Genre: Journal Article

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 Creators:
Feng, Hai L.1, Author              
Geibel, Christoph2, Author              
Jansen, Martin3, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              
3Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              

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 Abstract: The polycrystalline sample of a new osmate Ba3Os2O9 was synthesized by solid-state reactions. It crystallizes in Cs3Tl2Cl9-type structure, R (3) over bar cH (No. 167), and is electrically semiconducting with activated conduction behavior. No clear evidence for magnetic ordering is observed in the magnetic susceptibility. Instead it displays a very broad maximum around 170 K, indicating the onset of antiferromagnetic correlations, likely connected with the formation of magnetic dimers with an intra-dimer exchange, J congruent to 175 K. However, an analysis of the susceptibility reveals a reduced, but still finite susceptibility at low-temperature, in contrast to the fully gapped behavior expected for a simple dimer system. This suggests the presence of additional inter-dimer interactions, which might be frustrated and thus prevent a stable antiferromagnetic ordered state. The effective moment of 1.59 mu(B)/Os deduced from a dimer fit is much lower than the expected spin-only value of 2.83 mu(B), in accordance with expected strong spin-orbit interaction.

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Language(s): eng - English
 Dates: 2017-02-162017-02-16
 Publication Status: Published in print
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Title: Journal of Solid State Chemistry
Source Genre: Journal
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Publ. Info: Orlando, Fla. : Academic Press
Pages: - Volume / Issue: 249 Sequence Number: - Start / End Page: 15 - 20 Identifier: ISSN: 0022-4596
CoNE: /journals/resource/954922646045