Skip to main content Accesibility Help
×
×
Home

The Microstructure of Sputtered Co-Cr Magnetic Recording Media

  • Astrid Pundt (a1), Ralf Busch (a2) and Carsten Michaelsen (a3)
Abstract

With the increase of magnetic storage capacity in view, sub grain decomposition in Co-Cr magnetic recording material is examined with the field ion microscope / atom probe (FIM/AP) on a nanometer scale. Concentration variations in sputtered 50 nm Co-20at% Cr and 3 μm Co-22at% Cr films are analysed. Layers with up to 50 nm thickness are sputtered directly onto tungsten FIM tips. FTM-tips of layers with up to 3 μm thickness are prepared by a lithography and etching technique. The measurements show decomposition on the scale of a few nanometers. The concentration amplitudes vary between 11 at% Cr and 42 at% Cr within 50 nm films. Within 3 μm films the concentration varies from about 10 at% Cr to 30 at% Cr. Furthermore, at grain boundaries 3–4 nm precipitates of about 40 at% Cr are observed. The observed concentrations depend on substrate temperature. The compositional inhomogeneity can be explained by a miscibihty gap in the hep phase solid solution which is induced by magnetism at low temperatures.

Copyright
References
Hide All
[1] Iwasaki, S., Ouchi, K., IEEE Trans.Magn., MAG-14(5), 849 (1978)
[2] Fisher, R.D., Au-Yeung, V.S., Sabo, B.B., IEEE Trans.Magn., MAG-20(5), 806 (1984)
[3] Kobayashi, K., Ishida, G., J. Appl. Phys.52(3), 2453 (1981)
[4] Maeda, Y., Hirono, S., Asahi, M., Jap.J.Appl.Phys. 24(12), L951 (1985)
[5] Maeda, Y., Takahashi, M., IEEE Trans. Magn., MAG-24(6), 3012 (1988)
[6] Parker, F.T., Oesterreicher, H., Fullerton, E., J. Appl. Phys.66(12), 5988 (1989)
[7] Yoshida, K., Kakibayashi, H., Yasuoka, H., J.Appl.Phys.68(2), 705 (1990)
[8] Geber, G.P., Al-Kassab, T., Isheim, D., Busch, R., Haasen, P., Z. Metallkd. 83, 449 (1992)
[9] Busch, R., Schneider, S. (these proceedings)
[10] Hasegawa, N., Hono, K., Okano, R., Fujimori, H., Sakurai, T., Appl.Surf.Sci.67(1–4), 407 (1993)
[11] Wagner, R., Field-Ion Microscopy in Materials Science, in: Crystals, Vol.6, edited by Freyhardt, HC., Springer Verlag, Berlin 1982
[12] Kreyszig, E., Statistische Methoden und ihre Anwendungen. Vandenhoeck & Ruprecht Verlag Gtittingen 1965
[13] Pundt, A., Isheim, D. (in preparation)
[14] Hasebe, M., Oikawa, K., Nishizawa, T., J. Jap. Inst. Met.,46(6), .577 (1982)
[15] Green, A., Whittle, D.P., Stringer, J., Swindells, N., Scr. Met.7, 1079 (1973)
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed