Laser-induced Precession of Magnetization in GaMnAs

We report on the photo-induced precession of the ferromagnetically coupled Mn spins in (Ga,Mn)As, which is observed even with no external magnetic field applied. We concentrate on various experimental aspects of the time-resolved magneto-optical Kerr effect (TR-MOKE) technique that can be used to cl...

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Bibliographic Details
Published in:arXiv.org 2008-03
Main Authors: Rozkotova, E, Nemec, P, Sprinzl, D, Horodyska, P, Trojanek, F, Maly, P, Novak, V, Olejnik, K, Cukr, M, Jungwirth, T
Format: Article
Language:English
Subjects:
Ferromagnetism
Kerr magnetooptical effect
Precession
Online Access:Get full text
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Summary:We report on the photo-induced precession of the ferromagnetically coupled Mn spins in (Ga,Mn)As, which is observed even with no external magnetic field applied. We concentrate on various experimental aspects of the time-resolved magneto-optical Kerr effect (TR-MOKE) technique that can be used to clarify the origin of the detected signals. We show that the measured data typically consist of several different contributions, among which only the oscillatory signal is directly connected with the ferromagnetic order in the sample.
ISSN:2331-8422
DOI:10.48550/arxiv.0803.0320