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  Influence of O2 molecular orientation on p-orbital ordering and exchange pathways in Cs4O6

Arčon, D., Anderle, K., Klanjšek, M., Sans, A., Mühle, C., Adler, P., et al. (2013). Influence of O2 molecular orientation on p-orbital ordering and exchange pathways in Cs4O6. Physical Review B, 88(22): 224409, pp. 1-7. doi:10.1103/PhysRevB.88.224409.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0017-C0D4-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-31F2-7
Genre: Journal Article

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 Creators:
Arčon, D.1, Author
Anderle, K.1, Author
Klanjšek, M.1, Author
Sans, A.2, Author              
Mühle, C.1, Author
Adler, P.3, Author              
Schnelle, W.4, Author              
Jansen, M.2, Author              
Felser, C.5, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Peter Adler, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863435              
4Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
5Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: The coupling of charge, lattice, orbital, and spin degrees of freedom was studied in a p-electron mixed-valence Cs4O6 compound by the electron paramagnetic resonance (EPR) and Cs-133 nuclear magnetic resonance (NMR). The dramatic differences in the evolution of the EPR and Cs-133 NMR spectra measured under different cooling protocols reveal two competing low-temperature phases: quenched high-temperature cubic and the low-temperature low-symmetry phases, respectively. They differ in the orientation of O-2(-) anion axes, the ordering of p* molecular orbitals, and the superexchange interactions through the Cs+ bridges. The transformation between the two phases involves large amplitude reorientations of O-2 groups and is extremely sluggish, thus explaining the coexistence of both phases and the deviations of the magnetic susceptibility from the simple Curie-Weiss dependence at low temperatures.

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Language(s): eng - English
 Dates: 2013-12-012013-12-01
 Publication Status: Published in print
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Title: Physical Review B
  Other : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 88 (22) Sequence Number: 224409 Start / End Page: 1 - 7 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008