Structure and magnetic properties of co-sputtered Co-C thin films

T. J. Konno, K. Shoji, K. Sumiyama, K. Suzuki

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)


We studied the structure and magnetic properties of co-sputtered Co1-xCx thin films using a transmission electron microscope (TEM) and a SQUID magnetometer. These properties were found to depend critically on deposition temperature, TS, and composition, x. Generally, phase separation into metallic Co and graphite-like carbon phases proceeds with increasing TS and decreasing x. Plan view and cross-sectional TEM images of the films prepared showed that Co grains about 10-20 nm in diameter and 30-50 nm in height are three-dimensionally separated by graphite-like carbon layers 1-2 nm thick. Optimum magnetic properties with saturation magnetization of 380 emu/cc and coercivity of 400 Oe were obtained for a film with x = 0.5 and TS = 350 °C.

Original languageEnglish
Pages (from-to)9-18
Number of pages10
JournalJournal of Magnetism and Magnetic Materials
Issue number1
Publication statusPublished - 1999 Apr


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