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  Fused Perovskite Tunnel Structures in Ba5Fe6+xS4+xO8 (0.44≤x≤0.55) with x-Dependent Two-Stage Magnetizations

Wright, T., Prots, Y., & Valldor, M. (2016). Fused Perovskite Tunnel Structures in Ba5Fe6+xS4+xO8 (0.44≤x≤0.55) with x-Dependent Two-Stage Magnetizations. CHEMISTRY-A EUROPEAN JOURNAL, 22(32), 11303-11309. doi:10.1002/chem.201600997.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-9AEF-E Version Permalink: http://hdl.handle.net/21.11116/0000-0000-F4E9-6
Genre: Journal Article

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 Creators:
Wright, Taylor1, Author              
Prots, Yurii2, Author              
Valldor, Martin3, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863424              
3Martin Valldor, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863454              

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 Abstract: Ba5Fe6+xS4+xO8 was synthesized through a solid-state reaction, and pure powders of nominal compositions x=0.44-0.55 were obtained after being rinsed with water. The crystal structures (P4/mmm, a=10.13, c=4.03 angstrom) and sample purities were investigated by powder synchrotron Xray diffraction and were found to be composed of a tunnel lattice (Ba5Fe6S4O8), built from fused perovskite units and the tunnel filling (FexSx). The variable composition, that is, the tunnel filling (x), causes partially occupied sites as well as crystallographic split positions. Ba5Fe6+xS4+xO8 (x=0.525) is semiconducting and all investigated compositions exhibit magnetic ground states that could be described as either semi-spin-glass-like (x>0.5) or canted antiferromagnetic (x<0.5). The spin- glass in x=0.525 exhibits magnetic relaxations that are affected by ageing.

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Language(s): eng - English
 Dates: 2016-06-302016-06-30
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: ISI: 000382918700029
DOI: 10.1002/chem.201600997
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Title: CHEMISTRY-A EUROPEAN JOURNAL
Source Genre: Journal
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Pages: - Volume / Issue: 22 (32) Sequence Number: - Start / End Page: 11303 - 11309 Identifier: ISSN: 0947-6539