Research articles
Ferromagnetic resonance of quasiperiodic Au/Co Fibonacci multilayers: Magnetic anisotropy and interlayer coupling

https://doi.org/10.1016/j.jmmm.2018.10.127Get rights and content

Highlights

  • The number of absorption modes excited increases with the Fibonacci sequence’ term.

  • Main mode and interface mode were excited by the microwave field.

  • The spectra of multilayers also display spin-wave resonance modes.

Abstract

Ferromagnetic resonance (FMR) study of quasiperiodic Au/Co Fibonacci multilayers revealed that uniform resonance modes related to the bulk Co and interface Au/Co regions of Co layers were excited in all multilayers. Paramagnetic and spin-wave resonance (SWR) modes also were observed into multilayers associated to higher order Fibonacci sequence. The FMR results show that there is no direct correlation between the number of absorption modes and the number of magnetic layers or the Fibonacci generation sequence of the quasiperiodic structure. Analysis of SWR modes revealed an interlayer effective coupling constant higher than that known for conventional Au/Co multilayers.

Section snippets

Acknowledgements

The authors would like to thank Dr. C. Enderlein for his suggestions. This work was supported by the Brazilian agency CNPq (Project No. 150022/2016-6, 425936/2016-3, and 308617/2016-9). J. Quispe-Marcatoma acknowledges the financial support of CONCYTEC through the Excellence Center Programs (Contract No 195-2015-Fondecyt). E. Baggio-Saitovitch acknowledges support from several FAPERJ (Project No. E-26/110.666/2012, E-26/110.124/2013, and E-261101.4681/2014) and CNPq grants, in addition to CNPq

References (32)

  • M.G. Samant et al.

    Vacuum

    (2004)
  • C.G. Bezerra et al.

    Phys. A

    (1998)
  • J. Milton Pereira et al.

    Phys. Lett. A

    (2005)
  • J. Quispe-Marcatoma et al.

    J. Magn. Magn. Mater.

    (2013)
  • J. Quispe-Marcatoma et al.

    Thin Solid Films

    (2014)
  • T. Freire et al.

    Solid State Commun.

    (2011)
  • P. Chu-bing et al.

    J. Magn. Magn. Mater.

    (1992)
  • Z.J. Wang et al.

    J. Magn. Magn. Mater.

    (1997)
  • E.L. Albuquerque et al.

    Phys. Rep.

    (2003)
  • P. Poulopoulos et al.

    J. Phys.: Condens. Matter

    (1999)
  • E. Liu et al.

    J. Appl. Phys.

    (2017)
  • A. Jarosz et al.

    J. Appl. Phys.

    (2016)
  • A. Maziewski et al.

    Phys. Status Solidi A

    (2014)
  • C. Chappert et al.

    Phys. Rev. B

    (1986)
  • P. Chubing et al.

    Phys. Rev. B

    (1992)
  • R. Merlin et al.

    Phys. Rev. Lett.

    (1985)
  • View full text