Room temperature ferromagnetism in N-doped rutile TiO2 films
Room temperature ferromagnetism in N-doped rutile TiO2 films
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DOI：
10.1063/1.3535427
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发表时间：
2011-04-01
影响因子：
3.2
通讯作者：
Yi, J. B.
中科院分区：
文献类型：
--
作者：
Bao, N. N.;Fan, H. M.;Yi, J. B.
在N_2O气氛下用脉冲激光沉积法制备的TiO_2：N薄膜中观察到了室温铁磁性。当N_2O分压高于10（-5）Torr时，出现铁磁性。XPS研究表明，在10（-5）Torr分压下，N取代O，而在较高的N2 O分压下，除了取代N之外，额外的N原子占据间隙位置。我们的研究表明，铁磁性的起源是O被N取代。每个取代的N具有约0.9 μ（B）的磁矩。O的替代也导致p型行为，伴随着磁电阻和异常霍尔效应。(C)2011年美国物理学会。[doi：10.1063/1.3535427]
Room temperature ferromagnetism has been experimentally observed in TiO2: N films prepared by pulse laser deposition under N2O atmosphere. The ferromagnetism appears when the N2O partial pressure is higher than 10(-5) Torr. XPS study has revealed that N substitutes O at the partial pressure of 10(-5) Torr, whereas additional N atoms occupy interstitial sites besides substituting N at higher N2O partial pressures. Our study indicates that the origin of the ferromagnetism is the O substitution with N. Each substituted N has a magnetic moment of approximately 0.9 mu(B). The substitution of O also resulted in p-type behavior, accompanied with magnetoresistance and anomalous Hall effect. (C) 2011 American Institute of Physics. [doi:10.1063/1.3535427]