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  High-Temperature Ferrimagnetism with Large Coercivity and Exchange Bias in the Partially Ordered 3d/5d Hexagonal Perovskite Ba2Fe1.12Os0.88O6

Feng, H. L., Adler, P., Reehuis, M., Schnelle, W., Pattison, P., Hoser, A., et al. (2017). High-Temperature Ferrimagnetism with Large Coercivity and Exchange Bias in the Partially Ordered 3d/5d Hexagonal Perovskite Ba2Fe1.12Os0.88O6. Chemistry of Materials, 29(2), 886-895. doi:10.1021/acs.chemmater.6b04983.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-5452-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C391-2
Genre: Journal Article

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 Creators:
Feng, Hai L.1, Author              
Adler, Peter2, Author              
Reehuis, Manfred3, Author
Schnelle, Walter4, Author              
Pattison, Philip3, Author
Hoser, Andreas3, Author
Felser, Claudia5, Author              
Jansen, Martin6, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, escidoc:1863445              
2Peter Adler, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, escidoc:1863435              
3External Organizations, escidoc:persistent22              
4Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, escidoc:1863441              
5Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, escidoc:1863429              
6Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, escidoc:1863425              

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 Abstract: Double perovskite oxides A2BB′O6 combining 3d and 4d or 5d transition metal ions at the B and B′ sites feature a variety of magnetic and magneto-electric properties. Targeting Ba2FeOsO6, we synthesized powder samples of nonstoichiometric Ba2Fe1.12Os0.88O6 by solid-state reaction from the oxides. The crystal structure was investigated by using synchrotron powder X-ray and powder neutron diffraction. In contrast to Ca2FeOsO6 and Sr2FeOsO6, the compound adopts the hexagonal 6L perovskite structure (space group P3̅m1) with partial Fe–Os order at both the face-sharing B2O9 dimer and the corner sharing BO6 transition metal sites. Magnetization, neutron diffraction, and 57Fe Mössbauer spectroscopy results show that Ba2Fe1.12Os0.88O6 develops ferrimagnetic order well above room temperature at TC ≈ 370 K. The nonsaturated magnetization curve at 2 K features a magnetic moment of 0.4 μB per formula unit at 7 T and a pronounced hysteresis with a coercive field of about 2 T. Large exchange bias effects are observed when the magnetization curves are measured after field cooling. The peculiar magnetic properties of Ba2Fe1.12Os0.88O6 are attributed to an inhomogeneous magnetic state formed as a consequence of the atomic disorder. Our results indicate that hexagonal double-perovskite-related oxides are a promising class of compounds for finding new materials with potential applications as hard magnets or in the area of spintronics.

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Language(s): eng - English
 Dates: 2017-01-292017-01-29
 Publication Status: Published in print
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Title: Chemistry of Materials
  Abbreviation : Chem. Mater.
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 29 (2) Sequence Number: - Start / End Page: 886 - 895 Identifier: ISSN: 0897-4756
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925561571