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Recently, magnonic crystals which are the magnetic counterparts of photonic crystals or phononic crystals are growing into a hot area of research. In this paper, a plane-wave expansion method in the field of magnonic crystals is proposed. By using this method, band structures of two-dimensional magnonic crystals composed of ferromagnetic materials Fe and EuO are calculated. The numerical results show that the spin-wave gaps will be generated under a definite filling fraction ratio, and the effect of exchange field on the band structure is larger than that of other field in the effective field.
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Keywords:
- magnonic crystals /
- band gap /
- palne-wave expansion method
[1] 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
[2] Puszkarski H, Krawczyk M 2003 Solid State Phenom. 94 125
[3] Kruglyak V V, Kuchko A N 2001 Phys. Met. Metallogr. 92 211
[4] Krawczyk M, Puszkarski H 2008 Phys. Rev. B 77 054437
[5] Cao Y J, Yun G H, Liang X X, Bai N 2010 J. Phys. D: Appl. Phys. 43 305005
[6] Vasseur J O, Dobrzynski L, Djafari-Rouhani B 1996 Phys. Rev. B 54 1043
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[1] 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
[2] Puszkarski H, Krawczyk M 2003 Solid State Phenom. 94 125
[3] Kruglyak V V, Kuchko A N 2001 Phys. Met. Metallogr. 92 211
[4] Krawczyk M, Puszkarski H 2008 Phys. Rev. B 77 054437
[5] Cao Y J, Yun G H, Liang X X, Bai N 2010 J. Phys. D: Appl. Phys. 43 305005
[6] Vasseur J O, Dobrzynski L, Djafari-Rouhani B 1996 Phys. Rev. B 54 1043
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