Interesting magnetic behavior from reduced titanium dioxide nanobelts

被引：37

作者：

Chong, S. V. ^{[1
]}

Kadowaki, K. ^{[1
]}

Xia, J. ^{[2
]}

Idriss, H. ^{[3
]}

机构：

[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan

[2] Ind Res Ltd, Lower Hutt 5040, New Zealand

[3] Univ Auckland, Dept Chem, Auckland 1142, New Zealand

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 23期

基金：

日本学术振兴会;

关键词：

D O I：

10.1063/1.2944141

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetic behavior of titanium dioxide nanobelts has been investigated with and without Co doping. Room temperature ferromagnetism was observed when the Co-doped anatase TiO(2) nanobelts were prepared via vacuum annealing of 2.5 at. % Co-doped titanate nanobelts, while annealing them in air resulted in paramagnetic ordering. Interestingly, by vacuum annealing the undoped titanate nanobelts under the same conditions, superparamagnetic ordering was observed in the resulting anatase TiO(2) nanobelts. The electron paramagnetic resonance of this latter sample shows a strong symmetrical signal at g = 2.003 suggesting some sort of exchange interactions among the localized electrons' spin moments from single electron trapped in oxygen vacancies. (C) 2008 American Institute of Physics.

引用

页数：3

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