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Soft x-ray synchrotron radiation spectroscopy study of CuFe(1-x)Ni(x)O(2) (0 <= x <= 0.03) delafossite oxides SCIE SCOPUS

Title
Soft x-ray synchrotron radiation spectroscopy study of CuFe(1-x)Ni(x)O(2) (0 <= x <= 0.03) delafossite oxides
Authors
Kim, DHHwang, JHLee, KHKang, JSNozaki, THayashi, KKajitani, TPark, BGKim, JYMin, BI
Date Issued
2011-04-01
Publisher
AIP
Abstract
Electronic structures of Ni-doped CuFe1-xNixO2 delafossite oxides (x = 0, 0.015, and 0.03) have been investigated by employing soft x-ray absorption spectroscopy and soft x-ray magnetic circular dichroism (XMCD). It is found that the valence states of Cu, Fe, and Ni ions are nearly monovalent (Cu+), trivalent (Fe3(+)), and divalent (Ni2+), respectively, and that they do not change with x. In contrast, the Cu 2p XMCD signals, which arise from the Cu2+ states, increase with increasing x. This study suggests that the increasing XMCD signals are presumably related to the formation of ferrimagnetic spinel impurities in CuFe1-xNixO2. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3561041]
URI
https://oasis.postech.ac.kr/handle/2014.oak/10639
DOI
10.1063/1.3561041
ISSN
0021-8979
Article Type
Article
Citation
JOURNAL OF APPLIED PHYSICS, vol. 109, no. 7, page. 7D727, 2011-04-01
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