Hostname: page-component-8448b6f56d-jr42d Total loading time: 0 Render date: 2024-04-23T08:21:11.159Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructure and Chemical Ordering in UHV-Deposited, Polycrystalline Coxpt1−x Alloy Films for Magneto-Optical Recording*

Published online by Cambridge University Press:  15 February 2011

R. F. C. Farrow ,
D. Weller ,
M. F. Toney ,
T. A. Rabedeau ,
J. E. Hurst ,
G. R. Harp ,
R. F. Marks ,
R. H. Geiss  and
H. Notarys
R. F. C. Farrow
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120–6099;
D. Weller
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120–6099;
M. F. Toney
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120–6099;
T. A. Rabedeau
Affiliation:
Stanford Synchrotron Radiation Laboratory, Stanford CA 94305
J. E. Hurst
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120–6099;
G. R. Harp
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120–6099;
R. F. Marks
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120–6099;
R. H. Geiss
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120–6099;
H. Notarys
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120–6099;
Get access

Abstract

We report magneto-optical recording with 62 dB CNR (carrier-to-noise ratio) at 488 nm for quadrilayer structures comprising polycrystalline CoxPt1-x (x = 0.28) alloy films deposited on ungrooved, silicon nitride -coated glass discs, held at 300°C, by UHV evaporation. The key parameter controlling magnetic anisotropy of the films is substrate temperature during deposition. Polycrystalline films grown on amorphous silicon nitride have a large coercivity and full perpendicular remanance when grown at 300°C. Synchrotron X-ray diffraction data for polycrystalline films grown at 300 and 600°C confirm the presence of short-range compositional order, to the CoPt3-L12 phase in both cases. Such ordering can introduce an anisotropy in the distribution of Co-Co pairs in the alloy and is a possible source of the magnetic anisotropy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 343: Symposium H – Polycrystalline Thin Films - Structure, Texture, Properties and Applications , 1994 , 375
Copyright
Copyright © Materials Research Society 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

*

This work was supported in part by ONR Contract N00014- 92-C-0084.

References

REFERENCES

1. Weller, D., Brändle, H., Gorman, G., Lin, C.-J. and Notarys, H., Appl. Phys. Lett., 61, 2726 (1992).CrossRefGoogle Scholar
2. Weller, D., Hurst, J., Notarys, H., Brändle, H., Farrow, R.F.C., Marks, R., Harp, G., J. Magn. Soc. Japn., Suppl. S1, 72 (1993).Google Scholar
3. Farrow, R.F.C., Geiss, R.H., Gorman, G.L., Harp, G.R., Marks, R.F., Marinero, E.E., J. Magn. Soc. Japn., Suppl. S1, 140 (1993).Google Scholar
4. Hurst, J.E. Jr., Kozlovsky, W.J., Jpn. J.Appl.Phys. 32, 5301 (1993).Google Scholar
5. Fuoss, P.H., Brennan, S., Annual Rev. Mater. Sci., 20, 365 (1990).CrossRefGoogle Scholar
6. Weller, D., Chappert, C., Brändle, H., Gorman, G., Farrow, R.F.C., Marks, R., Harp, G., J. Magn. Soc. Japn., Suppl. S1, 76 (1993).Google Scholar
7. Weller, D., Brändle, H., Chappert, C., J. Mag.Magn. Mat., 121, 461 (1993).CrossRefGoogle Scholar
8. Marinero, E.E., Farrow, R.F.C., Harp, G.R., Geiss, R.H., Bain, J. A., Clemens, B., Mat. Res. Soc. Symp. Proc., 313, 677 (1993).CrossRefGoogle Scholar