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  Structure, Magnetism, and Valence States of Cobalt and Platinum in Quasi-One-Dimensional Oxides A3CoPtO6 with A = Ca, Sr

Mikhailova, D., Kuo, C.-Y., Reichel, P., Tsirlin, A. A., Efimenko, A., Rotter, M., et al. (2014). Structure, Magnetism, and Valence States of Cobalt and Platinum in Quasi-One-Dimensional Oxides A3CoPtO6 with A = Ca, Sr. The Journal of Physical Chemistry C, 118(10), 5463-5469. doi:10.1021/jp411503s.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-4183-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-6ECA-2
Genre: Journal Article

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 Creators:
Mikhailova, D.1, Author              
Kuo, C.-Y.2, Author              
Reichel, P.3, Author              
Tsirlin, A. A.4, Author              
Efimenko, A.3, Author              
Rotter, M.5, Author              
Schmidt, M.6, Author              
Hu, Z.7, Author              
Pi, T. W.8, Author
Jang, L. Y.8, Author
Soo, Y. L.8, Author
Oswald, S.8, Author
Tjeng, L. H.9, Author              
Affiliations:
1Daria Mikhailova, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863448              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
4Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
5Martin Rotter, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863453              
6Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863415              
7Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
8external, ou_persistent22              
9Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              

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 Abstract: Two quasi-one-dimensional oxides, Ca3CoPtO6 and Sr3CoPtO6, were synthesized and characterized. A combination of X-ray absorption spectroscopy at the Co-K-, Co-L2,3-, and Pt-L3-edges and X-ray photoelectron spectroscopy establishes unambiguously the divalent state of Co and the tetravalent state of Pt in both compounds, in contrast to the earlier assumption of the Co3+ and mixed Pt2+/Pt4+ valence states. Magnetization measurements reveal the paramagnetic behavior down to 2 K with strong evidence for an unquenched orbital moment of the high-spin Co2+. The simple paramagnetic behavior of A3CoPtO6 contrasts with the magnetic transitions observed in Ca3CoRhO6, Sr3CoIrO6, and other isostructural materials. This difference is ascribed to the nonmagnetic 5d6 state of Pt4+ that prevents magnetic couplings between the Co2+ ions.

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Language(s): eng - English
 Dates: 2014-01-24
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1021/jp411503s
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Title: The Journal of Physical Chemistry C
  Other : J. Phys. Chem. C
Source Genre: Journal
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Publ. Info: Washington DC : American Chemical Society
Pages: - Volume / Issue: 118 (10) Sequence Number: - Start / End Page: 5463 - 5469 Identifier: ISSN: 1932-7447
CoNE: /journals/resource/954926947766