Abstract
Nanogranular films of Co-C were fabricated by DC magnetron sputtering at high (30 mTorr) and low (5 mTorr) pressures with Co concentration controlled at about 40 at%. The granular morphology of the as-deposited film remains unchanged, and is altered, respectively, for 30 and 5 mTorr upon annealing. At annealing temperature Ta≥500 °C, the phase is changed from hexagonal closed-pack (HCP) Co to faulted HCP Co plus FCC Co for 30 mTorr, and to Co2C for 5 mTorr. Both the grain size and the coercivity increase with increase in Ta for 30 mTorr. The largest Hc=381 Oe is obtained at Ta=600 °C. Different microstructures and magnetic properties of the films made at the high and low pressures are compared and discussed.
| Original language | English |
|---|---|
| Pages (from-to) | e913-e915 |
| Journal | Journal of Magnetism and Magnetic Materials |
| Volume | 310 |
| Issue number | 2 SUPPL. PART 3 |
| DOIs | |
| Publication status | Published - 2007 Mar 1 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Lee, Y. H., Huang, Y. S., Min, J. F., Wu, G. M., & Horng, L. (2007). Microstructure and magnetic properties of Co-C nanogranular films. Journal of Magnetism and Magnetic Materials, 310(2 SUPPL. PART 3), e913-e915. https://doi.org/10.1016/j.jmmm.2006.10.947