Light-Induced Precession of Magnetization in Ferromagnetic Semiconductor (Ga,Mn)As |
| N. Tesařová, P. Němec, E. Rozkotová, F. Trojánek and P. Malý
Charles University in Prague, Faculty of Mathematics and Physics, Ke Karlovu 3, 121 06 Prague, Czech Republic |
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| Precession of magnetization induced by laser pulses in (Ga,Mn)As was studied by the pump-and-probe technique. We concentrated on various experimental aspects that can be used to identify a part of the measured magneto-optical signals that provides information about the dynamics of magnetization. We also revealed that that it takes about 80 ps before the quasi-equilibrium precession of magnetization is initiated by the impact of laser pulse. |
| DOI: 10.12693/APhysPolA.118.1065 PACS numbers: 75.50.Pp, 75.78.-n, 78.47.J-, 78.47.D- |