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In this paper, band structures and defect modes of two-dimensional magnonic crystals with line defect are calculated by using the plane-wave expansion method under supercell approximation. The obtained results show that line defect modes can be produced in the band gap by introducing the line defect bodies into the two-dimensional magnonic crystal. The presence of the line defect modes leads to the spin waves propagating along the direction of the line defects in these structures. Utilizing the wave-guide characteristic of line defect modes, two-dimensional magnonic crystals can be used as the materials for fabricating spin-wave waveguides.
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Keywords:
- magnonic crystals /
- line defects /
- wave-guide
[1] Zhao Y C, Zhao F, Yuan L B 2006 J. Synthetic Crystals 77 1000 (in Chinese) [赵言诚, 赵芳, 袁立波 2006 人工晶体学报 77 1000]
[2] Nikitov S A, Tailhades P, Tsai C S 2001 J. Magn. Magn. Mater. 236 320
[3] Wang Z K, Zhang V L, Lim H S, Ng S C, Kuok M H, Jain S, Adeyeye A O 2009 Appl. Phys. Lett. 94 083112
[4] Wang Z K, Zhang V L, Lim H S, Ng S C, Kuok M H, Jain S, Adeyeye A O 2010 ACS Nano. 4 643
[5] Vasseur J O, Dobrzynski L, Djafari-Rouhani B, Puszkarski H 1996 Phys. Rev. B 54 1043
[6] Cao Y J, Yun G H, Liang X X, Bai N 2010 J. Phys. D:Appl. Phys. 43 305005
[7] Yang H, Yun G H, Cao Y J 2011 J. Phys. D:Appl. Phys. 44 455001
[8] Puszkarski H, Krawczyk M 2003 Solid State Phenom. 94 125
[9] Krawczyk M, Puszkarski H 2008 Phys. Rev. B 77 054437
[10] Kuchko A N, Sokolovskii M L, Kruglyak V V 2005 Physica B 370 73
[11] Yang H, Yun G H, Cao Y J 2012 J. Appl. Phys. 111 013908
[12] Cao Y J, Tan W, Liu Y 2012 Acta Phys. Sin. 61 117501 (in Chinese) [曹永军, 谭伟, 刘燕 2012 61 117501]
[13] Cao Y J, Yun G H, Na R S 2011 Acta Phys. Sin. 60 077502 (in Chinese) [曹永军, 云国宏, 那日苏 2011 60 077502]
[14] Kruglyak V V, Kuchko A N 2001 Phys. Met. Metallogr. 92 211
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[1] Zhao Y C, Zhao F, Yuan L B 2006 J. Synthetic Crystals 77 1000 (in Chinese) [赵言诚, 赵芳, 袁立波 2006 人工晶体学报 77 1000]
[2] Nikitov S A, Tailhades P, Tsai C S 2001 J. Magn. Magn. Mater. 236 320
[3] Wang Z K, Zhang V L, Lim H S, Ng S C, Kuok M H, Jain S, Adeyeye A O 2009 Appl. Phys. Lett. 94 083112
[4] Wang Z K, Zhang V L, Lim H S, Ng S C, Kuok M H, Jain S, Adeyeye A O 2010 ACS Nano. 4 643
[5] Vasseur J O, Dobrzynski L, Djafari-Rouhani B, Puszkarski H 1996 Phys. Rev. B 54 1043
[6] Cao Y J, Yun G H, Liang X X, Bai N 2010 J. Phys. D:Appl. Phys. 43 305005
[7] Yang H, Yun G H, Cao Y J 2011 J. Phys. D:Appl. Phys. 44 455001
[8] Puszkarski H, Krawczyk M 2003 Solid State Phenom. 94 125
[9] Krawczyk M, Puszkarski H 2008 Phys. Rev. B 77 054437
[10] Kuchko A N, Sokolovskii M L, Kruglyak V V 2005 Physica B 370 73
[11] Yang H, Yun G H, Cao Y J 2012 J. Appl. Phys. 111 013908
[12] Cao Y J, Tan W, Liu Y 2012 Acta Phys. Sin. 61 117501 (in Chinese) [曹永军, 谭伟, 刘燕 2012 61 117501]
[13] Cao Y J, Yun G H, Na R S 2011 Acta Phys. Sin. 60 077502 (in Chinese) [曹永军, 云国宏, 那日苏 2011 60 077502]
[14] Kruglyak V V, Kuchko A N 2001 Phys. Met. Metallogr. 92 211
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