Hostname: page-component-669899f699-b58lm Total loading time: 0 Render date: 2025-04-30T19:49:04.678Z Has data issue: false hasContentIssue false
  • English
  • Français

Structural and Magnetic Properties of e-Beam Prepared CoxPt1-x Alloy Films

Published online by Cambridge University Press:  03 September 2012

J.V. Harzer ,
B. Hillebrands ,
I.S. Pogosova ,
M. Herrmann ,
G. Güntherodt  and
D. Weller
J.V. Harzer
Affiliation:
2. Physikalisches Institut, Rheinisch-Westfälische Technische Hochschule Aachen, Templergraben 55, W-5100 Aachen, Germany.
B. Hillebrands
Affiliation:
2. Physikalisches Institut, Rheinisch-Westfälische Technische Hochschule Aachen, Templergraben 55, W-5100 Aachen, Germany.
I.S. Pogosova
Affiliation:
2. Physikalisches Institut, Rheinisch-Westfälische Technische Hochschule Aachen, Templergraben 55, W-5100 Aachen, Germany.
M. Herrmann
Affiliation:
2. Physikalisches Institut, Rheinisch-Westfälische Technische Hochschule Aachen, Templergraben 55, W-5100 Aachen, Germany.
G. Güntherodt
Affiliation:
2. Physikalisches Institut, Rheinisch-Westfälische Technische Hochschule Aachen, Templergraben 55, W-5100 Aachen, Germany.
D. Weller
Affiliation:
IBM Almaden Research Center, San Jose, CA 95120, U.S.A.
Get access

Abstract

We have investigated structural and magnetic properties of CoPt alloy films with strong perpendicular magnetic anisotropy in the thickness range between 100Å and 400A. From a detailed x-ray analysis we find highly (111) -textured CoPt Microcrystal-lites in all samples. STM studies reveal a granular topography with grain diameters of up to 250Å. Measurements of hysteresis loops yield a saturation field which increases with thickness, and which is consistent with a freely mobile domain Model. Brillouin light scattering measurements of the frequencies of the surface and standing spin wave modes yield a bulk exchange constant, which is strongly dependent on the Pt content.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 313: Symposium Q1 – Magnetic Ultrathin Films, Multilayers and Surfaces/Magnetic Interfaces-Physics and Characterizations , 1993 , 387
Copyright
Copyright © Materials Research Society 1993

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.)

Article purchase

Temporarily unavailable

References

REFERENCES

[1] Weller, D., Brandie, H., Lin, C.-J., Notarys, H., Appl. Phys. Lett. 61, 2726 (1992).Google Scholar
[2] Weller, D., Brandie, H., Chappert, C., Symp. Mag. Ultrathin Films, Multilayers and Surfaces, Lyon, Sept. 1992, J. Magn. Magn. Mat., 121, 1993, 461 Google Scholar
[3] Weller, D., Hurst, J., Notarys, H., Brandie, H., Farrow, R.F.C., Marks, R., Harp, G., “MO signal in Co-Pt and Co-Pd alloy disks: comparison to respective multilayers and TbFeCo”, Proc. of MORIS'92, Tucson, to be published.Google Scholar
[4] Lin, C.-J. and Gorman, G., Appl. Phys. Lett. 61, 1600 (1992).Google Scholar
5 Kitada, M., Shimizu, N., J. Appl. Phys. 54, 7089 (1983).Google Scholar
6 Chen, T., Yamashita, T., IEEE Trans. Magn. MAG- 24, 2700 (1988).Google Scholar
7 Zhu, J.G., Bertram, H.N., J. Appl. Phys. 63, 3248 (1988).Google Scholar
[8] Murayama, A., Miyamura, M., Nishiyama, K., Miyata, K., Oka, Y., J. Appl. Phys. 69, 5661 (1991).Google Scholar
[9] Murayama, A., Miyamura, M., Ishikawa, S., Oka, Y., J. Appl. Phys. 67, 410 (1990).Google Scholar
[10] Draaisma, H.J.G., de Jonge, W.J.M., J. Appl. Phys. 62, 3318 (1987).Google Scholar
[11] Weiler, D., Notarys, H., Suzuki, T., Gorman, G., Logan, T., McFadyen, I., Chien, C.J., IEEE Trans. Mag. MAG-28, 2500 (1992), and references therein.Google Scholar
[12] Mock, R., Hillebrands, B., and Sandercock, J.R., J. Phys. E 20, 656 (1987).Google Scholar
[13] Kooy, C. und Enz, U., Philips Res. Rep. 15, 7 (1960).Google Scholar
14 Kleinefeld, T., Kim, W.S., Weller, D., (these proceedings).Google Scholar
[15] Hillebrands, B., Boufelfel, A., Falco, C.M., Baumgart, P., Güntherodt, G., Zirngiebl, E., Thompson, J.D., J. Appl. Phys. 63, 3880 (1988).Google Scholar
[16] Hillebrands, B., Güntherodt, G., in: Ultrathin Magnetic Structures Vol II, Bland, J.A.C., Heinrich, B. (eds.), Springer Verlag (Heidelberg, Berlin, London, New York, Tokyo, 1993).Google Scholar
[17] Grünberg, P., Light Scattering in Solids V, Cardona, M., Güntherodt, G. (eds.), Springer Ser. Topics Appl. Phys. 66, 303 (1989).Google Scholar
[18] Hillebrands, B., Phys. Rev. B 41, 530 (1990).Google Scholar
[19] Wohlfarth, E.P., in: Ferromagnetic Materials. A handbook on the properties of magnetically ordered substances, Wohlfarth, E.P. (editor), North-Holland New York (1980).Google Scholar