Intermetallic charge transfer and band gap of MTiO3 (M = Mn, Fe, Co, and Ni) studied by O 1s-edge X-ray emission spectroscopy

被引：40

作者：

Agui, A. ^{[1
]}

Mizumaki, M. ^{[2
]}

机构：

[1] Japan Atom Energy Res Agcy, Sayo, Hyogo 6795148, Japan

[2] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 2011年 / 184卷 / 8-10期

关键词：

Transition metal oxide; Ilmenite; Electronic band structure; X-ray emission spectroscopy; Synchrotron radiation; Charge transfer; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; TRANSITIONS; NITIO3; TI-4+; PHASE;

D O I：

10.1016/j.elspec.2011.06.001

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Charge transfer is a key concept in understanding X-ray spectra of transition metal oxides. In this study, X-ray absorption spectra (XAS) and X-ray emission spectra (XES) at the O 1s-edge of MTiO3 (ilmenite: M = Mn, Fe, Co, and Ni) have been measured. It was found that the O 1s-edge XES show the existence of not only oxygen-metal charge transfer but also intermetallic charger transfer. Moreover, the band gap of each ilmenite was evaluated to be 2.4-2.8 eV by measuring the distance between the spectra edges of XAS and XES. (C) 2011 Elsevier BM. All rights reserved.

引用

页码：463 / 467

页数：5

共 32 条

[1] Soft x-ray absorption spectra of ilmenite family [J].