Ultrakurze Magnonenpulse und Phonon-Magnon Wechselwirkungen
Zusammenfassung der Projektergebnisse
The main goals of the present project were (i) investigation of the generation and propagation of laser-induced magnon pulses and their interaction with acoustic pulses in different ferromagnetic materials and (ii) development of the experimental technique with multiple optical pump pulses to control the shape and duration of the magnon pulses. As a first step of the project, optical pump-probe experiments have been performed on different ferromagnetic materials and their alloys. These measurement demonstrates how material-specific parameters affect the generation and propagation of magnon pulses. Moreover, it has been shown that these parameters can be gradually adjusted by the doping with rare-earth metals. As the second step, we have performed pump-probe experiments with a train of several pump pulses in order to demonstrate that one can coherently control not only the homogeneous precession of the magnetization, but also higher non-uniform spin wave modes.
Projektbezogene Publikationen (Auswahl)
- “Observation of the nonlinear Woods anomaly on periodic arrays of nickel nanodimers ”, Physical Review B 98, 245425
N.-M. Tran, I.-A. Chioar, A. Stein, A. Alekhin, V. Juvé, G. Vaudel, I. Razdolski, V. Kapaklis, and V. Temnov
(Siehe online unter https://doi.org/10.1103/PhysRevB.98.245425) - “Gilbert damping in NiFeGd compounds: ferromagnetic resonance versus time-resolved spectroscopy ”, Physical Review B 99, 104412
R. Salikhov, A. Alekhin, T. Parpiiev, T. Pezeril, D. Makarov, R. Arudan, R. Merkenstock, F. Radu, M. Farle, H. Zabel, and V. Temnov
(Siehe online unter https://doi.org/10.1103/PhysRevB.99.104412) - “Magnetooptical properties of Au upon the injection of hot spin-polarized electrons across Fe/Au(001) interfaces ”, J. Phys.: Condens. Matter 31, 124002
A. Alekhin, I. Razdolski, M. Berritta, D. Bürstel, V. Temnov, D. Diesing, U. Bovensiepen, G. Woltersdorf, P.M. Oppeneer, and A. Melnikov
(Siehe online unter https://doi.org/10.1088/1361-648X/aafd06)
