Regensburg 2010 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 33: Poster II
MA 33.37: Poster
Freitag, 26. März 2010, 11:00–14:00, Poster B1
Micromagnetic simulation of three magnon scattering processes in spin-valve nanocontacts — •Florin Ciubotaru1, Alexander A. Serga1, Britta Leven1, Elzbieta Jaromirska2, Luis Lopez Diaz2, and Burkard Hillebrands1 — 1FB Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — 2Departamento de Fisica Aplicada, University of Salamanca, I-37008 Salamanca, Spain
The spin-wave emission from point contact spin-valve structures subjected to microwave and direct electrical currents through the contact is a topic of intensive research due to the large potential for on-chip data transfer. We report on micromagnetic simulations of the spin-wave distribution and on the analysis of the three magnon scattering processes (confluence and splitting of magnons) which were observed experimentally in such devices [1]. The obtained results evidence the localization of the splitting process within the contact area. The thresholds for the generation of the nonlinear spin-wave modes behave similarly with the experiment. Spectral position of linear and nonlinear modes is determined in phase and frequency domains. The simulations were performed using the OOMMF open code [2]. Support from EC-MRTN SPINSWITCH (MRTN-CT-2006-035327) is gratefully acknowledged.
[1] H. Schultheiss et al. Phys. Rev. Lett. 103, 157202 (2009)
[2] M. J. Donahue, and D. G. Porter, Report NISTIR 6376, National Institute of Standards and Technology, Gaithersburg, MD (1999).