Cobalt valence in epitaxial Ti0.93Co0.07O2 anatase

被引：26

作者：

Cui, ML

Zhu, J ^{[1
]}

Zhong, XY

Zhao, YG

Duan, XF

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, Electron Microscopy Lab, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[3] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 10期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.1784885

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Anatase Ti0.93Co0.07O2 films, synthesized by pulsed-laser deposition, have been investigated in the transmission electron microscope using selected area electron diffraction, energy dispersive x-ray analysis, and electron-energy-loss spectroscopy (EELS), and by x-ray diffraction measurements. It is found that Co ions are soluble in anatase, and that the unit-cell c-axis parameter is shortened, in some areas to even less than that in pure TiO2 anatase films. This observation was ascribed to substitution of the smaller Co3+ ions into the TiO2 anatase lattice. The EELS data confirm that Co is in either a +2 or +3 formal oxidation state in ferromagnetic Ti0.93Co0.07O2 films. (C) 2004 American Institute of Physics.

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页码：1698 / 1700

页数：3

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