Crystal structure and electronic states of Co and Gd ions in a Gd0.4Sr0.6CoO2.85 single crystal

被引：0
作者：
M. S. Platunov
V. A. Dudnikov
Yu. S. Orlov
N. V. Kazak
L. A. Solovyov
Ya. V. Zubavichus
A. A. Veligzhanin
P. V. Dorovatovskii
S. N. Vereshchagin
K. A. Shaykhutdinov
S. G. Ovchinnikov
机构：
[1] Russian Academy of Sciences,Kirensky Institute of Physics, Siberian Branch
[2] Russian Academy of Sciences,Institute of Chemistry and Chemical Technology, Siberian Branch
[3] National Research Centre Kurchatov Institute,undefined
[4] National Research Nuclear University MEPhI,undefined
来源：
JETP Letters | 2016年 / 103卷
关键词：
JETP Letter; Hole Doping; National Research Centre Kurchatov Institute; Effective Valence; Optical Floating Zone;
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摘要：
X-ray diffraction and X-ray absorption near edge structure (XANES) spectra have been measured at the Со K-edge and Gd L3-edge in GdCoO3 and Gd0.4Sr0.6CoO2.85 cobaltites. The effect of Sr substitution on the crystal structure and electronic and magnetic states of Co3+ ions in a Gd0.4Sr0.6CoO2.85 single crystal has been analyzed. The XANES measurements at the Co K-edge have not showed a noticeable shift of the absorption edge with an increase in the concentration of Sr. This indicates that the effective valence of cobalt does not change. An increase in the intensity of absorption at the Gd L3-edge is due to an increase in the degree of hybridization of the Gd(5d) and O(2p) states. The effect of hole doping on the magnetic properties results in the appearance of the ferromagnetic component and in a significant increase in the magnetic moment.
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页码：196 / 200
页数：4
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