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  Intricacies of the Co3+ spin state in Sr2Co0.5Ir0.5O4: An x-ray absorption and magnetic circular dichroism study

Agrestini, S., Kuo, C.-Y., Mikhailova, D., Chen, K., Ohresser, P., Pi, T. W., et al. (2017). Intricacies of the Co3+ spin state in Sr2Co0.5Ir0.5O4: An x-ray absorption and magnetic circular dichroism study. Physical Review B, 95(24): 245131, pp. 1-7. doi:10.1103/PhysRevB.95.245131.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-ADB4-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-ADB8-7
Genre: Journal Article

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 Creators:
Agrestini, S.1, Author              
Kuo, C.-Y.2, Author              
Mikhailova, D.3, Author              
Chen, K.4, Author
Ohresser, P.4, Author
Pi, T. W.4, Author
Guo, H.2, Author              
Komarek, A. C.5, Author              
Tanaka, A.4, Author
Hu, Z.6, Author              
Tjeng, L. H.7, Author              
Affiliations:
1Stefano Agrestini, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863459              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Daria Mikhailova, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863448              
4External Organizations, ou_persistent22              
5Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863446              
6Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
7Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              

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 Abstract: We report on a combined soft x-ray absorption and magnetic circular dichroism (XMCD) study at the Co-L-3,L-2 edge on the hybrid 3d/5d solid state oxide Sr2Co0.5Ir0.5O4 with K2NiF4 structure. Our data indicate unambiguously a pure high spin state (S = 2) for the Co3+ (3d(6)) ions with a significant unquenched orbital moment L-z/2S(z) = 0.25 despite the sizable elongation of the CoO6 octahedra. Using quantitative model calculations based on parameters consistent with our spectra, we have investigated the stability of this high spin state with respect to the competing low spin and intermediate spin states.

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Language(s): eng - English
 Dates: 2017-06-232017-06-23
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 95 (24) Sequence Number: 245131 Start / End Page: 1 - 7 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008