Document Detail


Charge transfer in spinel Co(3)O(4) at high pressures.
MedLine Citation:
PMID:  23032302     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Charge transfer in cobalt oxide Co(3)O(4) in the spinel structure is evidenced by experimental results using x-ray diffraction (XRD), x-ray absorption near edge structure (XANES) spectroscopy, and Raman scattering at high pressures up to 42.1, 24.6 and 35.1 GPa, respectively. While the cubic structure was found to persist under pressure up to 42.1 GPa based on the XRD and Raman results, the mode Grüneisen parameter was calculated according to our Raman measurements. Our structural data refinement revealed a structural transition from the normal spinel structure at low pressures to a partially inverse spinel structure at pressures above 17.7 GPa. This transition may be caused by the interaction of charges between tetrahedral and octahedral sites via a charge transfer process. Evidence for the charge transfer process is further supported by changes of the pre-edge features in the XANES data.
Authors:
Ligang Bai; Michael Pravica; Yusheng Zhao; Changyong Park; Yue Meng; Stas V Sinogeikin; Guoyin Shen
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-03
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  24     ISSN:  1361-648X     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  -    
Other Details:
Languages:  ENG     Pagination:  435401     Citation Subset:  -    
Affiliation:
Department of Physics and Astronomy, University of Nevada Las Vegas and High Pressure Science and Engineering Center (HiPSEC), Las Vegas, NV 89154-4002, USA.
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