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Dipole-exchange spin waves in Fibonacci magnetic multilayers

J. Milton Pereira Jr·R. N. Costa Filho
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Abstract

A microscopic model is employed to calculate the spectrum of spin waves in quasiperiodic magnetic multilayers in the dipole-exchange regime. Results are presented for structures in which thin ferromagnetic films are separated by non-magnetic spacers following a Fibonacci sequence and extend previous magnetostatic calculations. The results show the splitting of the frequency bands and the mode mixing caused by the dipolar interaction between the films as a function of spacer thickness, as well as the fractal aspect of the spectrum induced by the non-periodic aspect of the structure.

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J. Milton Pereira Jr, R. N. Costa Filho. 2005-03-29. Dipole-exchange spin waves in Fibonacci magnetic multilayers. https://doi.org/10.1016/j.physleta.2005.06.042

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