Nonreciprocal spin waves in Co-Ta-Zr films and multilayers

Pedram Khalili Amiri, Behzad Rejaei, Yan Zhuang, Marina Vroubel, Dok Won Lee, Shan X. Wang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The propagation of spin waves in single and multilayered ferromagnetic Co-Ta-Zr films is experimentally investigated in this work. Two microstrip antennas placed on top of the magnetic core are used for signal transmission and reception. A metallic ground layer placed on one side of the magnetic film leads to nonreciprocal spin wave dispersion, resulting in a direction-dependent coupling of the antennas. Compared to previous experiments with Ni-Fe films, the higher resistivity of the Co-Ta-Zr reduces the energy dissipation in the device and allows for the incorporation of a thicker magnetic film, thereby increasing the nonreciprocity and the spin wave propagation frequency range. In the case of the Co-Ta-Zr/SiO2 multilayer, the spin wave-mediated coupling of the antennas is strongly dependent on the relative orientation of the magnetizations in the individual layers, and on the application of an external magnetic field.

Original languageEnglish (US)
Article number5257122
Pages (from-to)4215-4218
Number of pages4
JournalIeee Transactions on Magnetics
Issue number10
StatePublished - Oct 2009


  • Magnetic microwave devices
  • Magnetic multilayers
  • Nonreciprocal devices
  • Soft magnetic films
  • Spin waves

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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