Room-Temperature Ferromagnetism in Reduced Rutile TiO2-δ Nanoparticles

被引：54

作者：

Parras, Marina ^{[1
]}

Varela, Aurea ^{[1
]}

Cortes-Gil, Raquel ^{[1
]}

Boulahya, Khalid ^{[1
]}

Hernando, Antonio ^{[2
,3
]}

Gonzalez-Calbet, Jose M. ^{[1
,3
]}

机构：

[1] Univ Complutense, Fac Quim, Dept Quim Inorgan, CEI Moncloa, E-28040 Madrid, Spain

[2] Univ Complutense, Fac Fis, Dept Fis Mat, CEI Moncloa, E-28040 Madrid, Spain

[3] Inst Magnetismo Aplicado UCM ADIF CSIC, Las Rozas 28230, Spain

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2013年 / 4卷 / 13期

关键词：

TIO2; MAGNETISM; TRANSITION; CHEMISTRY; DEFECTS; ANATASE; SURFACE;

D O I：

10.1021/jz401115q

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：

We report a synthesis method to stabilize TiO2 rutile nanopartides (around 10 nm) and keep the particle size when reduced down to TiO1.84. TiO2-delta nanoparticles exhibit room-temperature ferromagnetism that becomes stronger for TiO1.84. The reduction mechanism to stabilize Magneli phases excludes a relevant influence of oxygen vacancies in the modification of the magnetic properties. The arrangement of Ti3+ could give rise to hopping of the single 3d electron inducing local ferromagnetic-like behavior.

引用

页码：2171 / 2176

页数：6

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