TY - JOUR
T1 - Structure and magnetic properties of co-sputtered Co-C thin films
AU - Konno, T. J.
AU - Shoji, K.
AU - Sumiyama, K.
AU - Suzuki, K.
N1 - Funding Information:
The authors thank Mr. Y. Murakami for the EPMA analysis, performed in Laboratory for Developmental Research of Advanced Materials, IMR, Tohoku University. They also thank Mr. K. Wakoh for the help in setting up the sputtering chamber. This work was supported by the Grants-in-Aid for Scientific Research (A-2: 08405043), provided by the Ministry of Education, Science, Sports and Culture of Japan, and by CREST (Core Research for Evolutional Science and Technology) of Japan Science and Technology Corporation (JST).
PY - 1999/4
Y1 - 1999/4
N2 - 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.
AB - 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.
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U2 - 10.1016/S0304-8853(98)01160-3
DO - 10.1016/S0304-8853(98)01160-3
M3 - Article
AN - SCOPUS:0033515344
SN - 0304-8853
VL - 195
SP - 9
EP - 18
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 1
ER -