Dilute-defect magnetism: Origin of magnetism in nanocrystalline CeO2

被引：132

作者：

Fernandes, V. ^{[1
]}

Mossanek, R. J. O. ^{[2
]}

Schio, P. ^{[3
]}

Klein, J. J. ^{[1
]}

de Oliveira, A. J. A. ^{[3
]}

Ortiz, W. A. ^{[3
]}

Mattoso, N. ^{[2
]}

Varalda, J. ^{[2
]}

Schreiner, W. H. ^{[2
]}

Abbate, M. ^{[2
]}

Mosca, D. H. ^{[2
]}

机构：

[1] Univ Fed Parana, PIPE, BR-81531990 Curitiba, PR, Brazil

[2] Univ Fed Parana, Dept Fis, BR-81531990 Curitiba, PR, Brazil

[3] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, Brazil

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 03期

基金：

巴西圣保罗研究基金会;

关键词：

OXIDE; CERIA; SEMICONDUCTORS; FERROMAGNETISM;

D O I：

10.1103/PhysRevB.80.035202

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate experimentally and theoretically the origin of magnetism in nanocrystalline-undoped ceria films. Our results are consistent with density-functional calculations showing that both oxygen and cerium vacancies lead to ferromagnetism. Although the number of cerium vacancies is smaller than that of oxygen vacancies, the relatively high magnetic moment of the former might result in a substantial contribution to the magnetic properties. Diluted defect magnetism is suggested as a universal feature of ferromagnetism in nonmagnetic oxides without magnetic impurities.

引用

页数：7

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