Defect structure of the mixed ionic-electronic conducting Sr[Ti,Fe]Ox solid-solution system - Change in iron oxidation states and defect complexation

被引：37

作者：

Drahus, Michael D. ^{[1
]}

Jakes, Peter ^{[1
]}

Erdem, Emre ^{[1
]}

Eichel, Ruediger-A ^{[1
]}

机构：

[1] Univ Freiburg, Inst Phys Chem 1, D-79104 Freiburg, Germany

来源：

SOLID STATE IONICS | 2011年 / 184卷 / 01期

关键词：

Strontium titanate ferrite; Multi-valent iron; Oxygen vacancy; Charge compensation; Solubility limit; RESISTIVE SWITCHING MEMORIES; PARAMAGNETIC-RESONANCE; CHARGE COMPENSATION; SRTIO3; OXIDES; MECHANISMS; SPECTRUM; CENTERS; BATIO3; ESR;

D O I：

10.1016/j.ssi.2010.09.045

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxidation/reduction behavior of iron in the Sr[Ti1 - Fe-y(y)]O-x solid-solution system, for y is an element of [0.002: 0.05], under various oxygen partial pressures was examined through the use of electron paramagnetic resonance (EPR) spectroscopy. The results indicate that iron has been induced to move between di- tri- and tetravalent oxidation states. This results with the centers functioning as either a source (oxidation) or as a sink (reduction) for electrons. In particular it is shown that the reducibility of iron decreases with increasing iron content. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：47 / 51

页数：5

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