[1] [1] Chou S Y, Wei M S, Krauss P R, et al. Single-domain magnetic pillar array of 35 nm diameter and 65 Gbits/in2 density for ultrahigh density quantum magnetic storage[J]. J. Appl. Phys., 1994, 7(10): 6673-6675.

[2] [2] Chou St Y, Krauss P R, et al. Nanolithographically defined magnetic structures and quantum magnetic disk[J]. J. Appl. Phys., 1996, 79(8): 6101-6106.

[3] [3] White R L, New R M H, Pease R F W. Patterned media: A viable route to 50 Gbit/in2 and up for magnetic recording [J]. IEEE Trans. Mag., 1997, 33(1): 990-995.

[4] [4] Prinz G A. Magnetoelectronics[J]. Science, 1998, 282(5394): 1660-1663.

[5] [5] Zhu J G, Zheng Y F, Prinz G A. Ultrahigh density vertical magnetoresistive random access memory[J]. J. Appl. Phys., 2000, 87(9): 6668-6673.

[6] [6] Chason E, Shin J W, et al. Growth of patterned island arrays to identify origins of thin film stress[J]. J. Appl. Phys., 2014, 115(12): 123519.

[7] [7] Mathieu C, Hartmann C, Bauer M, et al. Anisotropic magnetic coupling of permalloy micron dots forming a square lattice[J]. Appl. Phys. Lett., 1997, 70(21): 2912-2914.

[8] [8] Cowburn R P. Property variation with shape in magnetic nanoelements[J]. J. Phys. D: Appl. Phys., 2000, 33: R1.

[9] [9] Tsymbal E Y. Theory of magnetostatic coupling in thin-film rectangular magnetic elements[J]. Appl. Phys. Lett., 2000, 77: 2740-2742.

[10] [10] Jorzick J, Krmer C, Demokritov S O, et al. Magneto-dipole coupling in arrays of micron-size rectangular magnetic elements[J]. J. Magn. Magn. Mater., 2001, 226-230: 1835-1837.

[11] [11] Hasegawa T, Yamazaki T, Kondo Y, et al. Fabrication of dot pattern using magnetic phase change on Pt ion-implanted L10 FePtRh film with high magnetocrystalline anisotropy[J]. J. Appl. Phys., 2014, 115(17): 17B721.

[12] [12] Zhai Y, Shi J, Zhang X Y, et al. A study of the non-uniform effect on the shape anisotropy in patterned NiFe films of ferromagnetic resonance[J]. J. Phys.: Condens. Matter, 2002, 14(34): 7865-7870.

[13] [13] Zighem F, Roussigné Y, Chérif S M, et al. Spin wave modelling in arrays of ferromagnetic thin stripes: Application to Brillouin light scattering in permalloy[J]. J. Phys.: Condens. Matter, 2007, 19(17): 176220.

[14] [14] Vaz C A F, Hayward T J, Llandro J, et al. Ferromagnetic nanorings[J]. J. Phys.: Condens. Matter, 2007, 19(25): 255207.

[15] [15] Gliga S, Yan M, Hertel R, et al. Ultrafast dynamics of a magnetic antivortex: Micromagnetic simulations[J]. Phys. Rev. B, 2008, 77: 060404.

[16] [16] Theodoropoulou N, Sharma A, Pratt W P, et al. Low frequency magnetization excitations in magnetic nanopillars induced by a dc spin-polarized current[J]. J. Appl. Phys., 2009, 105(7): 07D122.

[17] [17] Chang G S, Moewes A, Kim S H, et al. Uniaxial in-plane magnetic anisotropy of a CoPt thin film induced by ion irradiation[J]. Appl. Phys. Lett., 2006, 88(9): 092504.

[18] [18] Ross C A, Castao F J, Morecroft D, et al. Mesoscopic thin-film magnetic rings[J]. J. Appl. Phys., 2006, 99(8): 08S501.

[19] [19] Lepadatu S, Wu J, Xu Y B. Current-induced magnetization switching in asymmetric necked wires[J]. Appl. Phys. Lett., 2007, 91(6): 062512.

[20] [20] Niu D X, Zou X, Wu J, et al. Focused MOKE study of self-assembly nanoscale Fe64Ni36 dot arrays[J]. IEEE Trans. Mag., 2008, 44(11): 2749-2752.