Skip to main content

Magnetization Reversal by Rotation in Magnetic Thin Films Deposited on Step Bunched Si(111) Substrates

  • M. Sussiau (a1), A. Encinas (a1), F. Nguyen Van Dau (a1), A. Vaurès (a1), A. Schuhl (a1) and P. Galtier (a1)...

Magnetic and magnetoresistive properties of magnetic thin films deposited on periodically structured substrates have been studied. By using a thermodynamical heat treatment, we activate the step bunching phenomenon on vicinal Si(111) substrates misoriented towards [112] which results in a laterally modulated surface with a period around 0.1 μm. Epitaxial magnetic thin films deposited on these substrates exhibit an in-plane uniaxial anisotropy and a specific magnetoresistive behavior which characterizes the magnetization reversal process. In this contribution, we demonstrate that these properties can also be observed in non-epitaxial structures grown either by molecular beam epitaxy or by sputtering. In particular, magnetotransport measurements show that by varying parameters such as the nature of the magnetic metal, the layer thickness or the strength of the induced anisotropy, we can modulate the interplay between the anisotropy and the exchange stiffness, and, consequently, observe gradual magnetization reversal behaviors between a Stoner-Wohlfarth uniform mode and a non-uniform mode.

Hide All
1. de la Figuera, J., Huerta-Guernica, M.A., Prieto, J.E., Ocal, C. and Miranda, R., Appl. Phys. Lett., 66, 1006 (1995).
2. Wulfhekel, W., Knappmann, S. and Oepen, H.P., J. Appl. Phys., 79, 988 (1996).
3. Oepts, W., Gijs, M.A.M., Reinders, A., Jungblut, R.M., van Ganseinkel, R.M.J. and de Jonge, W.J.M., Phys. Rev. B, 53, 14024 (1996).
4. Sussiau, M., Nguyen Van Dau, F., Galtier, P. and Schuhl, A., Appl. Phys. Lett., 69, 857 (1996).
5. Sussiau, M., Nguyen Van Dau, F., Galtier, P., Encinas, A. and Schuhi, A., J. Mag. Mag. Mat., 165, 1 (1997).
6. Nguyen Van Dau, F., Sussiau, M., Schuhl, A. and Galtier, P., J. Appl. Phys., 81 (8) (1997), to appear.
7. Emmerson, C.M. and Shen, T.-H., J. Mag. Mag. Mat., 156, 15 (1996).
8. Stoner, E.C. and Wohlfarth, E.P., Trans. Roy. Soc. (London), A 240, 599 (1948).
9. This explanation is only valid at 0 K. Hf is the reverse field for which both the first and second derivative of the energy becomes zero.
10. Although the averaging is denoted by brackets in both cases, the kind of averaging is obviously not the same for the two experiments.
11. Wernsdorfer, W., Doudin, B., Mailly, D., Hasselbach, K., Benoit, A., Meier, J., Ansermet, J-Ph. and Barbara, B., Phys. Rev. Lett., 77, 1873 (1996).
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? *