Role of valence-band Co 3d states on ferromagnetism in Zn1-xCoxO nanorods

被引：18

作者：

Chiou, J. W.

Tsai, H. M.

Pao, C. W.

Kumar, K. P. Krishna

Chen, J. H.

Ling, D. C.

Chien, F. Z.

Pong, W. F. ^{[1
]}

Tsai, M. -H.

Wu, J. J.

Yang, M. -H.

Liu, S. C.

Hong, I. -H.

Chen, C. -H.

Lin, H. -J.

Lee, J. F.

机构：

[1] Tamkang Univ, Dept Phys, Tamsui 251, Taiwan

[2] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan

[3] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan

[4] Natl Synchrotron Radiat Res Ctr, Hsinchu 300, Taiwan

[5] Natl Chiayi Univ, Dept Appl Phys, Chiayi, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 06期

关键词：

D O I：

10.1063/1.2432234

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This work investigates the electronic and ferromagnetic properties of Zn1-xCoxO nanorods using x-ray absorption, x-ray magnetic circular dichroism, and scanning photoelectron microscopy methods. The magnetic moment of Co ions in Zn1-xCoxO nanorods is found greatly reduced relative to that of the Co metal. The intensities of valence-band features near the valence-band maximum/Fermi level (E-F) of ferromagnetic nanorods are substantially larger than those of weaker ferromagnetic nanorods, suggesting that the occupation of near-E-F valence-band Co 3d states is important in determining the ferromagnetic behavior in Zn1-xCoxO nanorods. (c) 2007 American Institute of Physics.

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页数：3

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共 24 条

[1] Comparison of the electronic structures of Zn1-xCoxO and Zn1-xMgxO nanorods using x-ray absorption and scanning photoelectron microscopies [J].

Chiou, J. W. ;

Tsai, H. M. ;

Pao, C. W. ;

Kumar, K. P. Krishna ;

Ray, S. C. ;

Chien, F. Z. ;

Pong, W. F. ;

Tsai, M. -H. ;

Chen, C. -H. ;

Lin, H. -J. ;

Wu, J. J. ;

Yang, M. -H. ;

Liu, S. C. ;

Chiang, H. H. ;

Chen, C. W. .

APPLIED PHYSICS LETTERS, 2006, 89 (04)

[2] Diameter dependence of the electronic structure of ZnO nanorods determined by x-ray absorption spectroscopy and scanning photoelectron microscopy [J].

Chiou, JW ;

Kumar, KPK ;

Jan, JC ;

Tsai, HM ;

Bao, CW ;

Pong, WF ;

Chien, FZ ;

Tsai, MH ;

Hong, IH ;

Klauser, R ;

Lee, JF ;

Wu, JJ ;

Liu, SC .

APPLIED PHYSICS LETTERS, 2004, 85 (15) :3220-3222

[3] Electronic structure of ZnO nanorods studied by angle-dependent x-ray absorption spectroscopy and scanning photoelectron microscopy [J].

Chiou, JW ;

Jan, JC ;

Tsai, HM ;

Bao, CW ;

Pong, WF ;

Tsai, MH ;

Hong, IH ;

Klauser, R ;

Lee, JF ;

Wu, JJ ;

Liu, SC .

APPLIED PHYSICS LETTERS, 2004, 84 (18) :3462-3464

[4] Donor impurity band exchange in dilute ferromagnetic oxides [J].

Coey, JMD ;

Venkatesan, M ;

Fitzgerald, CB .

NATURE MATERIALS, 2005, 4 (02) :173-179

[5] Zener model description of ferromagnetism in zinc-blende magnetic semiconductors [J].

Dietl, T ;

Ohno, H ;

Matsukura, F ;

Cibert, J ;

Ferrand, D .

SCIENCE, 2000, 287 (5455) :1019-1022

[6] Bound magnetic polaron interactions in insulating doped diluted magnetic semiconductors [J].

Durst, AC ;

Bhatt, RN ;

Wolff, PA .

PHYSICAL REVIEW B, 2002, 65 (23) :2352051-23520510

[7] Spin-glass-like behavior in CoO nanoparticles and the origin of exchange bias in layered CoO/Ferromagnet structures [J].

Gruyters, M .

PHYSICAL REVIEW LETTERS, 2005, 95 (07)

[8] First-principles LDA+U calculations of the Co-doped ZnO magnetic semiconductor [J].

Hu, Shu-jun ;

Yan, Shi-shen ;

Zhao, Ming-wen ;

Mei, Liang-mo .

PHYSICAL REVIEW B, 2006, 73 (24)

[9] Room-temperature ultraviolet nanowire nanolasers [J].

Huang, MH ;

Mao, S ;

Feick, H ;

Yan, HQ ;

Wu, YY ;

Kind, H ;

Weber, E ;

Russo, R ;

Yang, PD .

SCIENCE, 2001, 292 (5523) :1897-1899

[10] Ferromagnetism induced by clustered Co in Co-doped anatase TiO2 thin films -: art. no. 017401 [J].

Kim, JY ;

Park, JH ;

Park, BG ;

Noh, HJ ;

Oh, SJ ;

Yang, JS ;

Kim, DH ;

Bu, SD ;

Noh, TW ;

Lin, HJ ;

Hsieh, HH ;

Chen, CT .

PHYSICAL REVIEW LETTERS, 2003, 90 (01)