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Structural Design of Alternately Deposited Co-Cr Multilayer Films with Carbon Intermediate Layers

Published online by Cambridge University Press:  26 February 2011

Shigeki Nakagawa
Affiliation:
Masahiko Naoe Dept. of Physical Electronics, Tokyo Institute of Technology. 2-12-1 0-okayama, Meguro-ku, Tokyo 152, JAPAN
Yoshitaka Kitamoto
Affiliation:
Masahiko Naoe Dept. of Physical Electronics, Tokyo Institute of Technology. 2-12-1 0-okayama, Meguro-ku, Tokyo 152, JAPAN
Yoshiro Niimura
Affiliation:
Masahiko Naoe Dept. of Physical Electronics, Tokyo Institute of Technology. 2-12-1 0-okayama, Meguro-ku, Tokyo 152, JAPAN
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Abstract

The microstructural characteristics of sputtered Co-Cr films, such as grain size observed by SEM and the crystallite size estimated by x-ray diffractometry, vary throughout the thickness of the film. The grain and crystallites size become larger, as the film grows. In this study, multilayered Co-Cr thin films with intermediate layers of amorphous carbon have been prepared by Facing Targets Sputtering (FTS) in order to produce films with uniform structure throughout the entire thickness of the film. Amorphous carbon sputtered films have been used as intermediate layers since they are fully continuous, even though they are very thin so that they may not affect the crystallographic structure of Co-Cr thin film successively deposited. The carbon thin layer deposited at Ar gas pressure lower than 2 mTorr did not cause the degradation in c-axis orientation of the Co-Cr crystallites in the Co-Cr thin films. Then, the films composed of ten Co-Cr layers with thickness of 200Å were deposited, varying the thickness of carbon intermediate layers δup to 200 X. The grain size in these multilayered film show same vaiue as that of 200 Å-thick single layer film without intermediate carbon layers. These results indicate that the multilayered films prepared by this technique are composed of fine grains of comparable size.

Type
Research Article
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCE

[1] Yamamoto, S., Nakamura, Y. and Iwasaki, S., IEEE Trans. on Magn.,MAG–23 2070 1987 CrossRefGoogle Scholar
[2] Byun, C., Sivertsen, J.M. and Judy, J.H., J. Appl. Phys., 57, 3997 1985 Google Scholar
[3] Tanaka, T., Ouchi, K. and Iwasaki, S., J. Magn. Soc. Jpn., 10 65 1986 Google Scholar
[4] Hemmes, K., Lisowski, W., Lodder, J.C., Hanekamp, L.J. and Popma, Th.J.A., Appl. Phys. 19 1311 1986 Google Scholar
[5] Nakagawa, S., Niimyra, Y. and Naoe, M., Mater. Res. Symp. Proc. 80 409 1987 Google Scholar
[6] Niimura, Y., Nakagawa, S., Hoshi, Y. and Naoe, M., IEEE Trans. on Magn., MAG–23 2461 1987 CrossRefGoogle Scholar