An X-ray absorption spectroscopic study of YBa2Cu3-xFexO7+y

被引：3
|
作者：
Faiz, M [1 ]
Zhou, X
Moler, EJ
Kellar, SA
Hussain, Z
Hamdan, NM
Ziq, KA
机构：
[1] King Fahd Univ Petr & Minerals, Dept Phys, Dhahran 31261, Saudi Arabia
[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
来源：
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 1999年 / 101卷
关键词：
high-T-c superconductors; XANES; XRD; YBa2Cu3-xFexO7+y;
D O I：
10.1016/S0368-2048(98)00402-2
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
We report a study of X-ray absorption near-edge structure of the O K and Cu L-3 edges in YBa2Cu3-xFexO7+y for x=0.01, 0.05 and 0.15. We attribute the peaks below 529 eV in the O K edge spectra of YBa2Cu3-xFexO7+y to holes on the O sites. Our results show hole filling with increasing Fe content, which means that Fe enters the structure primarily in the formally trivalent oxidation state. Cu L-3 edge spectra reveal increased amounts of Cu3+ with increasing Fe content. The results are discussed in terms of charge balancing. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：707 / 711
页数：5
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