d carrier induced intrinsic room temperature ferromagnetism in Nb:TiO2 film

被引：84
|
作者：
Yang, J. Y. [1 ]
Han, Y. L. [1 ]
He, L. [1 ]
Dou, R. F. [1 ]
Xiong, C. M. [1 ]
Nie, J. C. [1 ]
机构：
[1] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 20期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.4707378
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
High crystalline anatase TiO2 and Nb:TiO2 thin films were fabricated on LaAlO3 (100) substrates by pulsed laser deposition. Room temperature ferromagnetism was obtained in Nb:TiO2 but absent in pure TiO2. The Kondo effect and anomalous Hall effect observed in metallic Nb:TiO2 strongly confirmed the existence of exchange interaction between intrinsic local magnetic moments and carriers. High energy resolution x-ray photoelectron spectroscopy studies of the Nb:TiO2 thin film revealed clear signals of Ti3+ and Nb4+ ions, which had one unpaired d electron responsible for the local magnetic moments. This result consisted quite well with the spin polarized first principle calculation. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4707378]
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页数：4
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