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A new, layered monoclinic phase of Co3O4 at high pressure
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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.
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Physical Sciences Chemical Sciences
URN: urn:nbn:se:kth:diva-172188DOI: 10.1039/c5cp02126jISI: 000358347500031PubMedID: 26166770OAI: diva2:846543

QC 20150817

Available from: 2015-08-17 Created: 2015-08-14 Last updated: 2015-08-17Bibliographically approved

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Ahuja, Rajeev
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Applied Material Physics
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