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  Structural invariance upon antiferromagnetic ordering in geometrically frustrated swedenborgite, CaBaCo2Fe2O7

Reim, J. D., Rosén, E., Schweika, W., Meven, M., Leo, N. R., Meier, D., et al. (2014). Structural invariance upon antiferromagnetic ordering in geometrically frustrated swedenborgite, CaBaCo2Fe2O7. Journal of Applied Crystallography, 47, 2038-2047. doi:10.1107/S1600576714023528.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-9EB8-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-71C4-4
Genre: Journal Article

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 Creators:
Reim, J. D.1, Author
Rosén, E.1, Author
Schweika, W.1, Author
Meven, M.1, Author
Leo, N. R.1, Author
Meier, D.1, Author
Fiebig, M.1, Author
Schmidt, M.1, Author
Kuo, C.-Y.2, Author              
Pi, T.-W.1, Author
Hu, Z.3, Author              
Valldor, M.4, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
4Martin Valldor, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863454              

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 Abstract: Centimetre-sized single crystals of high-quality CaBaCo2Fe2O7 were synthesized by the optical floating zone technique. The metal-to-metal stoichiometry and oxygen content were confirmed by spectroscopy and thermal reduction experiments. The hexagonal symmetry P6(3)mc (No. 186) well describes the powder X-ray and neutron diffraction as well as single-crystal neutron diffraction at all measured temperatures. This symmetry is also consistent with optical second harmonic generation data obtained between 10 and 295 K. However, a satisfactory structure description from single-crystal neutron diffraction data needs an oxygen split position. Specific heat, magnetic susceptibility and powder neutron diffraction data indicate a magnetic phase transition at T-N = 159 K to an antiferromagnetic ground state, but with a persisting hexagonal symmetry and intrinsic geometric frustration.

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Language(s): eng - English
 Dates: 2014-10-30
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000345877900027
DOI: 10.1107/S1600576714023528
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Title: Journal of Applied Crystallography
Source Genre: Journal
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Publ. Info: Oxford, England : Blackwell Publishing on behalf of the International Union of Crystallography
Pages: - Volume / Issue: 47 Sequence Number: - Start / End Page: 2038 - 2047 Identifier: ISSN: 0021-8898
CoNE: /journals/resource/954925410812