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| Characterization of Metal/Cobalt Ferrite Magnetic Thin Films |
| Journal of Magnetics, Volume 3, Number 1, 31 Mar 1998, Pages 31-35 |
| C.H. Park(Korea Institute of Science and Technology), J.G. Na(Korea Institute of Science and Technology), N.H. Heo(Materials and Corrosion Lab., KEPRI), S.R. Lee(Department of Metals Engineering, Korea University), J. Kim(Department of Metals Engineering, Hanyang University), K. Park(Department of Materials Engineering, Chung-ju National University) |
| Abstract |
| Metal/cobalt ferrite composite thin films with the saturation magnetization (Ms) of~580 emu/cm3 and the coercivity(Hc) of 1700 Oe were prepared by the reactive sputtering. With increasing substrate temperature, Ms of the thin films increased, while Hc of the thin films decrease. This sttributed to the precipitation of CoxFe1-x(x≈0.62) metal phase in the thin films. The metal phase showed the BCC structure (a0=2.89 Å) and Im3m space group. Also, the cobalt ferrite phase was identified as CoFe2O4 with a cubic structure (a0=8.39 Å) and a space group of Fd3m. For the higher cobalt content than the stoichiometric composition, Co37.8Fe62.2, the thin films with high Ms and Hc could be obtained in the wide substrate temperature range (200-40 ℃). |
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