NDLI: Synchrotron-Radiation Study of Valence States and Electronic Structures of <formula formulatype=inline> <tex Notation=TeX>$hbox{AgNi}_{1-{rm x}}hbox{Co}_{rm x}hbox{O}

Content Provider	IEEE Xplore Digital Library
Author	Kang, J.-S. Lee, S.S. Lee, H.J. Kim, G. Kim, D.H. Song, H.K. Shin, Y.J. Jung, M.C. Shin, H.J. Lee, J.E. Min, B.I.
Copyright Year	1965
Abstract	The electronic structures of AgNi_1-xCo_xO₂ (0 les x les 1) delafossite oxides have been investigated by employing photoemission spectroscopy (PES) and X-ray absorption spectroscopy (XAS) in the soft X-ray regime of synchrotron radiation. The Ag 3d core-level PES spectra shift toward the higher binding energy with increasing x, in agreement with the metallic nature for low values of x and the insulating nature for high values of x in AgNi_1-xCo_xO₂ . Further, the Ag 3d core-level PES spectra become more asymmetric with decreasing x, which reflects the larger number of electron-hole pairs in the Ni-rich regime. Valence-band PES spectra reveal that the band width of the occupied Ni 3d states is broader than that of the Co 3d states, implying the larger Ni 3d-O 2p hybridization than the Co 3d-O 2p hybridization. The Co and Ni 2p XAS spectra show that Co ions are in the low-spin Co³⁺ states for all x, while Ni ions are in the Ni²⁺-Ni³⁺ mixed-valent states. The Ni³⁺ component increases with x.
Sponsorship	IEEE Magnetics Society
Starting Page	2580
Ending Page	2583
Page Count	4
File Size	444888
File Format	PDF
ISSN	00189464
Volume Number	45
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spectroscopy Slabs Magnetic susceptibility Physics Photoelectricity Electromagnetic wave absorption Synchrotron radiation Insulation Iron Stacking XAS Delafossite electronic structure PES synchrotron radiation
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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