@article{e3fec35f958d445d89ec3d25a57c34e0,
title = "Soft x-ray synchrotron radiation spectroscopy study of CuFe 1-xNixO2 (0≤x≤0.03) delafossite oxides",
abstract = "Electronic structures of Ni-doped CuFe1-xNixO 2 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.",
author = "Kim, {D. H.} and Hwang, {J. H.} and Lee, {K. H.} and Kang, {J. S.} and T. Nozaki and K. Hayashi and T. Kajitani and Park, {B. G.} and Kim, {J. Y.} and Min, {B. I.}",
note = "Funding Information: This work was supported by the NRF under Contract Nos. 2009-0064246 and 2009-0079947. The experiment at PLS is supported by POSTECH and MEST. Work at Tohoku University was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology of Japan. J.Y.K. acknowledges the support by the KRF (KRF-2008-314-C00094).",
year = "2011",
month = apr,
day = "1",
doi = "10.1063/1.3561041",
language = "English",
volume = "109",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics",
number = "7",
}