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

页码：707 / 711

页数：5

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