In this paper a theoretical investigation of the metamaterial properties of a three-dimensional binary magnonic crystal is performed. The system is formed by a periodic array of cobalt circular dots partially embedded into a permalloy film 16 nm thick, the periodicity is a = 600 nm, the dot diameter is d = 310 nm and the dot thickness is L = 8 nm. The dispersion and the band gaps at Brillouin zone boundaries of the most representative magnonic mode mainly confined in the permalloy film is obtained up to the third Brillouin zone for the external magnetic field H applied along the y axis and for the Bloch wave vector K along the x direction in the plane of the system. The collective mode dynamics is studied within an effective medium approximation in the propagative regime and the metamaterial wave dispersion is discussed.
Metamaterial properties of three-dimensional permalloy/cobalt magnonic crystals -- Conferenza internazionale
ZIVIERI, Roberto;MALAGO', Perla;GIOVANNINI, Loris
2013
Abstract
In this paper a theoretical investigation of the metamaterial properties of a three-dimensional binary magnonic crystal is performed. The system is formed by a periodic array of cobalt circular dots partially embedded into a permalloy film 16 nm thick, the periodicity is a = 600 nm, the dot diameter is d = 310 nm and the dot thickness is L = 8 nm. The dispersion and the band gaps at Brillouin zone boundaries of the most representative magnonic mode mainly confined in the permalloy film is obtained up to the third Brillouin zone for the external magnetic field H applied along the y axis and for the Bloch wave vector K along the x direction in the plane of the system. The collective mode dynamics is studied within an effective medium approximation in the propagative regime and the metamaterial wave dispersion is discussed.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
