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A new, layered monoclinic phase of Co3O4 at high pressure
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
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2015 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 17, no 30, 19957-19961 p.Article in journal (Refereed) Published
Abstract [en]

We present the crystal structures and electronic properties of a Co3O4 spinel under high pressure. Co3O4 undergoes a first-order transition from a cubic (CB) Fd (3) over barm to a lower-symmetry monoclinic (MC) P2(1)/c phase at 35 GPa, occurring after the local high-spin to low-spin phase transition. The high-pressure phase exhibits the octahedral coordination of Co(II) and Co(III), whereas the CB phase contains the fourfold coordination of Co(II) and the sixfold coordination of Co(III). The CB-to-MC transition is attributed to the charge-transfer between the di-and trivalent cations via the enhanced 3d-3d interactions.

Place, publisher, year, edition, pages
2015. Vol. 17, no 30, 19957-19961 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-260744DOI: 10.1039/c5cp02126jISI: 000358347500031PubMedID: 26166770OAI: oai:DiVA.org:uu-260744DiVA: diva2:848287
Funder
Swedish Research Council
Available from: 2015-08-24 Created: 2015-08-24 Last updated: 2017-12-04Bibliographically approved

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Kaewmaraya, ThanayutLuo, WeiYang, XiaoPanigrahi, PuspamitraAhuja, Rajeev

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