Development of FeCo-based thin films for gigahertz applications

Eunji Yu, Jong Sik Shim, Inyoung Kim, Jongryoul Kim, Suk Hee Han, Hi Jung Kim, Ki Hyeon Kim, Masahiro Yamaguchi

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)


For improving high-frequency characteristics and soft magnetic properties of (Fe7 Co3)B-based thin films, the effects of Ni addition and an oblique deposition method on the microstructures have been examined. The Ni addition to (Fe7Co3)B films was found to enhance B segregation on grain boundaries, which resulted in the formation of a well-defined columnar structure and the increase of film resistivity. Utilizing the columnar structure, large in-plane anisotropy was induced by an oblique deposition method which enabled the control of the inclination angle of the columns. As a result, the ferromagnetic resonance of (Fe7Co 3)71Ni7B22 thin films reached 6.2 GHz.

Original languageEnglish
Pages (from-to)3259-3261
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number10
Publication statusPublished - 2005 Oct


  • High-frequency characteristics
  • Microstructural analysis
  • Oblique deposition method
  • Soft magnetic thin film


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