Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-28T07:31:21.710Z Has data issue: false hasContentIssue false
  • English
  • Français

Modeling the fs Demagnetization: Laser-Induced Reversal in an Applied Magnetic Field

Published online by Cambridge University Press:  01 February 2011

Francesco Dalla Longa ,
Dion Boesten ,
Harm H.J.E. Kicken ,
Wim J.M. de Jonge  and
Bert Koopmans
Francesco Dalla Longa
Affiliation:
[email protected], Eindhoven University of Technology, Department of Applied Physics and center for NanoMaterials (cNM), P.O. Box 513, 5600 MB Eindhoven, N/A, N/A, Netherlands
Dion Boesten
Affiliation:
[email protected], Eindhoven University of Technology, Department of Applied Physics and center for NanoMaterials (cNM), P.O. Box 513, 5600 MB Eindhoven, N/A, N/A, Netherlands
Harm H.J.E. Kicken
Affiliation:
[email protected], Eindhoven University of Technology, Department of Applied Physics and center for NanoMaterials (cNM), P.O. Box 513, 5600 MB Eindhoven, N/A, N/A, Netherlands
Wim J.M. de Jonge
Affiliation:
[email protected], Eindhoven University of Technology, Department of Applied Physics and center for NanoMaterials (cNM), P.O. Box 513, 5600 MB Eindhoven, N/A, N/A, Netherlands
Bert Koopmans
Affiliation:
[email protected], Eindhoven University of Technology, Department of Applied Physics and center for NanoMaterials (cNM), P.O. Box 513, 5600 MB Eindhoven, N/A, N/A, Netherlands
Get access

Abstract

A novel model for ultrafast laser-induced magnetization dynamics is analyzed. Equilibration of the magnetic system is described by including electron-phonon scattering events with a finite spin flip probability. Recently, we demonstrated that such a model predicts a direct relation between the demagnetization time and the Gilbert damping. Here we present numerical simulations based on the same Hamiltonian, but including the presence of an external applied field. Thereby, reversal of the magnetization after heating above the Curie temperature (Tc) can be modeled. We demonstrate that magnetization reversal can be achieved even if the lattice temperature stays below Tc.

Keywords

spintronicelectron-phonon interactionsmagnetooptic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 941: Symposium Q – Magnetic Thin Films, Heterostructures, and Device Materials , 2006 , 0941-Q02-02
Copyright
Copyright © Materials Research Society 2006

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.)

References

1 Beaurepaire, E., Merle, J.C., Daunois, A., and Bigot, J.Y., Phys. Rev. Lett. 76 4250 (1996).Google Scholar
2 Koopmans, B. in Top. Appl. Phys.; Spin Dynamics in Confined Magnetic Structures II, eds. Hillebrands, B. and Ounadjela, K., pp. 253–320 (Springer, Berlin, 2003).Google Scholar
3 Ju, Ganping, Hohlfeld, J., Bergman, B., Veerdonk, R.J.M. van de, Mryasov, O.N., Kim, Jai-Young, Wu, Xiaowei, Weller, D., and Koopmans, B., Phys. Rev. Lett. 93 197403 (2004).Google Scholar
4 Thiele, J.U., Buess, M., and Back, C.H., Appl. Phys. Lett. 85 2857 (2004).Google Scholar
5 Zhang, G.P. and Hübner, W., Phys. Rev. Lett. 85 3025 (2000).Google Scholar
6 Koopmans, B., J. Ruigrok, J. M., Longa, F. Dalla, and Jonge, W. J. M. de, Phys. Rev. Lett. 95 267207 (2005).Google Scholar
7 Beaurepaire, E., Maret, M., Halté, V., Merle, J.C., Daunois, A., Bigot, J.Y., Phys. Rev. B 58 12134 (1998).Google Scholar
8 Hohlfeld, J., Th. Gerrits, Bilderbeek, M., Rasing, Th., Awano, H., Ohta, N., Phys. Rev. B 65 012413 (2001).Google Scholar
9 Koopmans, B., Kicken, H.J.J.E., Kampen, M. Van, and Jonge, W.J.M. de, J. Magn. Magn. Mat. 286 271 (2005).Google Scholar