We theoretically investigate static and dynamic properties of quasiperiodic magnetic multilayers. We considered identical ferromagnetic layers separated by non-magnetic spacers with two different thicknesses chosen based on the Fibonacci sequence. Using parameters for Fe/Cr, the minimum energy was determined and the equilibrium magnetization directions found were used to calculate magnetoresistance curves. Regarding dynamic behavior, ferromagnetic resonance (FMR) curves were calculated using an approximation known from the literature. Our numerical results illustrate the effects of quasiperiodicity on the static and dynamic properties of these structures.
Received 31 October 2012Accepted 28 November 2012Published online 06 March 2013
We would like to thank the Brazilian Research Agencies CNPq, FINEP, FAPERN, and FAPESP for the financial support. Work at Argonne was supported by the US Department of Energy, Basic Energy Sciences under Contract No. DE-AC02-06CH1135. CGB acknowledges financial support from CAPES (Grant No 10144-12-9).