Integrated microstrip lines with Co-Ta-Zr magnetic films

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

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Microstrip transmission lines with ferromagnetic Co-Ta-Zr cores are investigated in this paper. Compared to nonmagnetic devices, an increase in both inductance (×11) and quality factor (× 6) is achieved in the transmission lines. The role of the magnetic material's electrical resistivity and the effect of the shape-induced anisotropy field (created by patterning the magnetic film into narrow stripes) are discussed. It is shown that the nonuniform distribution of the shape anisotropy inside the Co-Ta-Zr pattern can be used to advantage by proper placement of the signal line, thereby increasing the ferromagnetic resonance (FMR) frequency of the magnetic core. Inductance enhancement is achieved at frequencies up to ∼10 GHz.

Original languageEnglish (US)
Pages (from-to)3103-3106
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number11 PART 2
StatePublished - Nov 2008


  • Magnetic anisotropy
  • Magnetic microwave devices
  • Microstrip
  • Planar transmission lines
  • Soft magnetic films

ASJC Scopus subject areas

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


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