Ferromagnetism in Nitrogen-Doped TiO2 Nanoparticles

被引：6

作者：

Wen, Qi-Ye ^{[1
]}

Zhang, Huai-Wu ^{[1
]}

Yang, Qing-Hui ^{[1
]}

Jing, Yu-Lan ^{[1
]}

Zhang, Pei-Xin ^{[2
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Films & Integrated Devices, Chengdu 610054, Peoples R China

[2] Shenzhen Univ, Sch Chem & Chem Engn, Shenzhen 518060, Peoples R China

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2011年 / 47卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Magnetic Semiconductors; nonmagnetic ions doping; nanoparticles; PHOTOCATALYSTS; TEMPERATURE;

D O I：

10.1109/TMAG.2011.2153832

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Nitrogen-doped anatase TiO2 nanoparticles were synthesized by a two-step wet chemical method. The N element is proved to be incorporated into the lattice of TiO2 with an average concentration of 3.3 at%. Magnetic measurements show that the undoped TiO2 is ferromagnetic at room-temperature (RT), which can be ascribed to a universal ferromagnetism (FM) in nanoparticles of metal oxides. However, significant enhancement of the FM was observed in N-doped TiO2 nanoparticles and it is robust against high-temperature annealing. Our results confirm the first-principle prediction that spin-polarized holes induced by N doping can mediate the spin alignment of the N dopants, leading to the strong RT FM in anatase TiO2.

引用

页码：3987 / 3990

页数：4

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