X-RAY ABSORPTION SPECTROSCOPY INNaCo2O4,LaCoO3andSrCoO3

Tomohira Matsushita, Masaichiro Mizumaki, Naoshi Ikeda, Makoto Nakazawa, Akane Agui, Yuji Saitoh, Takeshi Nakatani, Akitaka Yoshigoe and Shin Nakamura
Additional contact information
Tomohira Matsushita: Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan
Masaichiro Mizumaki: Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan
Naoshi Ikeda: Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan
Makoto Nakazawa: Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan
Akane Agui: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute (JAERI), SPring-8, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan
Yuji Saitoh: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute (JAERI), SPring-8, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan
Takeshi Nakatani: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute (JAERI), SPring-8, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan
Akitaka Yoshigoe: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute (JAERI), SPring-8, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan
Shin Nakamura: School of Science and Engineering, Teikyo University, 1-1 Toyosatodai, Utsunomiya 320, Japan

Surface Review and Letters (SRL), 2002, vol. 09, issue 02, 1327-1331

Abstract: We have performed Co2pX-ray absorption spectroscopy (XAS) on a mixed valence hexagonal layered systemNaCo2O4, which shows large thermopower and metallic conductivity. We also measured XAS forSrCoO3andLaCoO3as examples of typical Co ionic states. The Co ions of the last two materials are octahedrally surrounded by oxygen atoms. A Co atom inNaCo2O4also has octahedral coordination with oxygen atoms but it is distorted slightly. The Co ions inSrCoO3andLaCoO3are in thed5andd6configuration respectively. The spectrum ofNaCo2O4resembles that ofLaCoO3rather than that ofSrCoO3; the Co ions inNaCo2O4can be regarded as thed6configuration. Also, we have tried to calculate the XAS spectra by using the charge-transfer multiplet model (CT-M). Although we could not find out the best-fitting parameters, the results suggested the itinerancy of the Co3dstates.

Date: 2002
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X02003755
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:09:y:2002:i:02:n:s0218625x02003755

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X02003755

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().