[1] Yan J F, Zhang Z Y, You T G, Zhao W, Yun J N, Zhang F C 2009 Chin. Phys. B 18 4552
[2] Budnick J I, Taylor G W 2002 Appl. Phys. Lett. 80 4404
[3] Han M G, Ou Y, Liang D F, Deng L J 2009 Chin. Phys. B 18 1601
[4] Liu X G, Geng D Y, Meng H, Shang P J, Zhang Z D 2008 Appl. Phys. Lett. 92 173117
[5] Zhang X F, Dong X L, Huang H, Liu Y Y, Wang W N, Zhu X G, Lv B, Lei J P, Lee C G 2006 Appl. Phys. Lett. 89 053115
[6] Liu Q L, Zhang D, Fan T X 2008 Appl. Phys. Lett. 93 013110
[7] Dong X L, Zhang X F, Huang H, Zuo F 2008 Appl. Phys. Lett. 92 013127
[8] Ma Q, Jiang J J, Bie S W, Du G, Feng Z K, He H H 2008 Acta. Phys. Sin. 57 6577 (in Chinese)[马 强、 江建军、 别少伟、 杜 刚、 冯则坤、 何华辉 2008 物理学报 57 6577]
[9] Zhao D L, Zeng X W, Shen Z M 2005 Acta. Phys. Sin. 54 3878 (in Chinese)[赵东林、 曾宪伟、 沈曾民 2005 物理学报 54 3878]
[10] Ma Q, Jiang J J, Bie S W, Tian B, Liang P, He H H 2009 Chin. Phys. B 18 2063
[11] Han Z, Li D, Wang H, Liu X G., Li J, Geng D Y, Zhang Z D 2009 Appl. Phys. Lett. 95 023114
[12] Gong Y X, Zhen L, Jiang J T, Xu C Y, Shao W Z 2009 J. Appl. Phys. 106 064302
[13] Encinas A, Vila L, Darques M, George J M, Piraux L 2007 Nanotechnology 18 065705
[14] Darques M, Encinas A, Vila L, Piraux L 2004 J. Phys. D: Appl. Phys. 37 1411
[15] Darques M, Piraux L, Encinas A, Bayle-Guillemaud P, Popa A, Ebels U 2005 Appl. Phys. Lett. 86 072508
[16] Zhang J, Jones G A, Shen T H, Donnelly S E, Li G H 2007 J. Appl. Phys. 101 054310
[17] Ursache A, Goldbach J T, Russell T P, Tuominen M T 2005 J. Appl. Phys. 97 10J322
[18] Han X H, Liu Q F, Wang J B, Li S L, Ren Y, Liu R L, Li F S 2009 J. Phys. D: Appl. Phys. 42 095005
[19] Li D D, Thompson R S, Bergmann G, Lu J G 2008 Adv. Mater. 20 4575
[20] Qunadjela K, Ferré R, Louail L, George J M, Maurice J L, Piraux L, Dubois S 1997 J. Appl. Phys. 81 5455
[21] Encinas-Oropesa A, Demand M, Piraux L, Huynen I, Ebels U 2001 Phys. Rev. B 63 104415
[22] http: //math. nist. gov/oommf
[23] Xu D W, Gao H, Xue D S 2007 Acta. Phys. Sin. 56 7274(in Chinese)[徐东伟、 高 华、 薛德胜 2007 物理学报 56 7274]
[24] Deng L J, Han M G 2007 Appl. Phys. Lett. 91 023119
[25] Jiang M J, Dang Z M, Bozlar M, Miomandre F, Bai J 2009 J. Appl. Phys. 106 084902
[26] Liao S B 1998 Ferromagnetism (Beijing: Science Press) pp6—139 (in Chinese)[廖绍彬 1998 铁磁学(北京: 科学出版社)第6—139页]
[27] Wu M Z, Zhang Y D, Hui S, Xiao T D, Ge S H, Hines W A,
[28] Goglio G, Pignard S, Radulescu A, Piraux L, Huynen I, Vanhoenacker D, Vorst A V 1999 Appl. Phys. Lett. 75 1769
[29] Cao J W, Huang Y H, Zhang Y, Liao Q L, Deng Z Q 2008 Acta. Phys. Sin. 57 3641(in Chinese)[曹佳伟、 黄运华、 张 跃、 廖庆亮、 邓战强 2008 物理学报 57 3641]
[30] Shi X L, Cao M S, Yuan J, Fang X Y 2009 Appl. Phys. Lett. 95 163108