Granular magnetic cobalt metal/polymer thin film system

Jongill Hong, Eric Kay, Shan X. Wang

Research output: Contribution to journalArticle

15 Citations (Scopus)


Thin films consisting of granular dispersions of cobalt nano-particles in a hydrocarbon matrix are fabricated by simultaneous sputtering of cobalt and plasma induced polymerization of hydrocarbon monomers. It is confirmed that cobalt nano-particles with a hexagonal close-packed (hcp) structure are uniformly distributed throughout the amorphous hydrocarbon matrix. In-plane magnetic hysteresis loops obtained by MOKE (Magneto-Optic Kerr Effect) magnetometry measurements show significant differences between granular cobalt crystallites dispersed throughout the polymeric film matrix and cobalt crystallites in a continuous polycrystalline pure cobalt film due to the mechanism of domain boundary pinning. For the first time, the domain structures and wall motion in a cobalt/polymer system are captured in real time by Lorentz microscopy.

Original languageEnglish
Pages (from-to)4475-4477
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 PART 2
Publication statusPublished - 1996 Dec 1

All Science Journal Classification (ASJC) codes

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

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