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氧空位对Co掺杂TiO2稀磁半导体中杂质分布和磁交换的影响

孙运斌 张向群 李国科 杨海涛 成昭华

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氧空位对Co掺杂TiO2稀磁半导体中杂质分布和磁交换的影响

孙运斌, 张向群, 李国科, 杨海涛, 成昭华

Effects of oxygen vacancy on impurity distribution and exchange interaction in Co-doped TiO2

Sun Yun-Bin, Zhang Xiang-Qun, Li Guo-Ke, Yang Hai-Tao, Cheng Zhao-Hua
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  • 本文使用基于密度泛函理论的第一性原理方法研究了Co掺杂TiO2稀磁半导体中氧空位对体系能量和磁性的影响. 通过对总能量的计算发现当引入氧空位后近邻杂质体系能量高于均匀掺杂体系, 同时氧空位易在Co近邻位置富集. 进而发现氧空位的存在及其占位可以影响Co离子间的磁交换, 近邻Co离子体系下氧空位的引入使Co离子间的铁磁耦合减弱; 非近邻Co离子体系下, 底面氧空位使Co离子间呈反铁磁耦合而顶点氧空位使Co离子间呈铁磁耦合. 总之, 氧空位的存在对Co掺杂TiO2材料的能量及磁性都有较大影响.
    Dilute magnetic semiconductors have auracted much attention because of their potential applications in spintronics. In this paper, the effects of oxygen vacancy on total energy and magnetism in Co-doped TiO2 are investigated using the density functional theory. The energy of the system with a shorter Co-Co distance is higher than that with larger Co-Co distance after introducing oxygen vacancy. Oxygen vacancy trends to congregate around the Co cations. Moreover, the strength of exchange couple reduces in the system with a shorter Co-Co distance after introducing oxygen vacancy. For the system with a larger Co-Co distance, the exchange couple between two Co impurities is anti-ferromagnetic if oxygen vacancy is located at the basal site of octahedron containing Co, and ferromagnetic if oxygen vacancy is located at the apical site of octahedron containing Co.
    • 基金项目: 国家重点基础研究发展计划(973项目)(批准号: 2010CB934202)和国家自然科学基金资助的为课题.
    • Funds: Project supported by the National Basic Research Program of China(Grant No.2010CB934202 ), and the National Natural Science Foundation of China.
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    Manivannan A, Glaspell G, Dutta P, Seehra M S 2005 J. Appl. Phys. 97 10D325

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    Kang S H, Quynh H N T, Yoon S G, Kim E T, Lee Z, Radmilovic V 2007 Appl. Phys. Lett. 90 102504

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    Shutthanandan V, Thevuthasan S, Heald S M, Droubay T, Engelhard M H, Kaspar T C, McCready D E, Saraf L, Chambers S A, Mun B S, Hamdan N, Nachimuthu P, Taylor B, Sears R P, Sinkovic B 2004 Appl. Phys. Lett. 84 4466

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    Song H Q, Chen Y X, Ren M J, Ji G 2005 Acta Phys. Sin. 54 369 (in Chinese) [宋红强, 陈延学, 任妙娟, 季刚 2003 物理学报 54 369 ]

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    Li G K, Zhang X Q, Wu H Y, Huang W G, Jin J L, Sun Y, Cheng Z H 2009 Chin. Phys. B 18 3551

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    Chen J, Rulis P, Ouyang L, Satpathy S, Ching W Y 2006 Phys. Rev. B 74 235207

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    Weng H M, Yang X P, Dong J M, Mizuseki H, Kawasaki M, Kawazoe Y 2004 Phys. Rev. B 69 125219

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    Mamiya K, Koide T, Fujimori A, Tokano H, Manaka H, Tanaka A, Toyosaki H, Fukumura T, Kawasaki M 2006 Appl. Phys. Lett. 89 062506

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    Murakami M, Matsumoto Y, Hasegawa T, Ahmet P, Nakajima K, Chikyow T, Ofuchi H, Nakai I, Koinuma H 2004 J. Appl. Phys. 95 5330

    [20]

    Kresse G, Furthmüller J 1996 Phys. Rev. B 54 11169

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    Blöchl P E 1994 Phys. Rev. B 50 17953

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    Hill R J, Howard C J 1987 J. Appl. Cryst. 20 467

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    Sato K, Bergqvist L, Kudrnovsk′y J, Dederichs P H, Eriksson O, Turek I, Sanyal B, Bouzerar G, Katayama-Yoshida H, Dinh V A, Fukushima T, Kizaki H, Zeller R 2010 Rev. Mod. Phys. 82 1633

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    Kennedy R J, Stampe P A, Hu E H, Xiong P, Molnar S V, Xin Y 2004 Appl. Phys. Lett. 84 2832

  • [1]

    Ohno H 1998 Science 281 951

    [2]

    Park Y D, Hanbichi A T, Erwin S C, Hellberg C S, Sullivan J M, Mattson J E, Ambrose T F, Wilson A, Spanos G, Jonker B T 2002 Science 295 651

    [3]

    Lin Q B, Li R Q, Zeng Y Z, Zhu Z Z 2006 Acta Phys. Sin. 55 873 (in Chinese) [林秋宝, 李仁全, 曾永志, 朱梓忠 2006 物理学报 55 873]

    [4]

    Coey J M D 2006 Curr. Opin. Solid State Mater. Sci. 10 83

    [5]

    Matsumoto Y, Murakami M, Shono T, Hasegawa T, Fukumura T, Kawasaki M, Ahmet P, Chikyow T, Koshihara S, Koinuma H 2001 Science 291 854

    [6]

    Balcells L, Frontera C, Sandiumenge F, Roig A, Mart′?nez B 2006 Appl. Phys. Lett. 89, 122501

    [7]

    Wang Z J, Tang J K, Zhang H G, Golub V, Spinu L, Tung L D 2004 J. Appl. Phys. 95 7381

    [8]

    Park W K, Ortega-Hertogs R J, Moodera J S, Punnoose A, Seehra M S 2002 J. Appl. Phys. 91 8093

    [9]

    Manivannan A, Glaspell G, Dutta P, Seehra M S 2005 J. Appl. Phys. 97 10D325

    [10]

    Kim D H, Yang J S, Kim Y S, Kim D W, Noh T W, Bu S D, Kim Y W, Park Y D, Pearton S J, Jo Y, Park J G 2003 Appl. Phys. Lett. 83 4574

    [11]

    Kang S H, Quynh H N T, Yoon S G, Kim E T, Lee Z, Radmilovic V 2007 Appl. Phys. Lett. 90 102504

    [12]

    Shutthanandan V, Thevuthasan S, Heald S M, Droubay T, Engelhard M H, Kaspar T C, McCready D E, Saraf L, Chambers S A, Mun B S, Hamdan N, Nachimuthu P, Taylor B, Sears R P, Sinkovic B 2004 Appl. Phys. Lett. 84 4466

    [13]

    Song H Q, Chen Y X, Ren M J, Ji G 2005 Acta Phys. Sin. 54 369 (in Chinese) [宋红强, 陈延学, 任妙娟, 季刚 2003 物理学报 54 369 ]

    [14]

    Li G K, Zhang X Q, Wu H Y, Huang W G, Jin J L, Sun Y, Cheng Z H 2009 Chin. Phys. B 18 3551

    [15]

    Chen J, Rulis P, Ouyang L, Satpathy S, Ching W Y 2006 Phys. Rev. B 74 235207

    [16]

    Weng H M, Yang X P, Dong J M, Mizuseki H, Kawasaki M, Kawazoe Y 2004 Phys. Rev. B 69 125219

    [17]

    Yan W S, Sun Z H, Pan Z Y, Liu Q H, Yao T, Wu Z Y, Song C, Zeng F, Xie Y N, Hu T D, Wei S Q 2009 Appl. Phys. Lett. 94 042508

    [18]

    Mamiya K, Koide T, Fujimori A, Tokano H, Manaka H, Tanaka A, Toyosaki H, Fukumura T, Kawasaki M 2006 Appl. Phys. Lett. 89 062506

    [19]

    Murakami M, Matsumoto Y, Hasegawa T, Ahmet P, Nakajima K, Chikyow T, Ofuchi H, Nakai I, Koinuma H 2004 J. Appl. Phys. 95 5330

    [20]

    Kresse G, Furthmüller J 1996 Phys. Rev. B 54 11169

    [21]

    Blöchl P E 1994 Phys. Rev. B 50 17953

    [22]

    Hill R J, Howard C J 1987 J. Appl. Cryst. 20 467

    [23]

    Sato K, Bergqvist L, Kudrnovsk′y J, Dederichs P H, Eriksson O, Turek I, Sanyal B, Bouzerar G, Katayama-Yoshida H, Dinh V A, Fukushima T, Kizaki H, Zeller R 2010 Rev. Mod. Phys. 82 1633

    [24]

    Kennedy R J, Stampe P A, Hu E H, Xiong P, Molnar S V, Xin Y 2004 Appl. Phys. Lett. 84 2832

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出版历程
  • 收稿日期:  2011-03-21
  • 修回日期:  2011-05-17
  • 刊出日期:  2012-01-05

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