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.
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收藏
页码：2171 / 2176
页数：6
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