Laser-induced Precession of Magnetization in GaMnAs

E. Rozkotova; P. Nemec; D. Sprinzl; P. Horodyska; F. Trojanek; P. Maly; V. Novak; K. Olejnik; M. Cukr; T. Jungwirth

doi:10.1109/TMAG.2008.2003061

Laser-induced Precession of Magnetization in GaMnAs

Materials Science 2009-11-13 v1

Authors: E. Rozkotova , P. Nemec , D. Sprinzl , P. Horodyska , F. Trojanek , P. Maly , V. Novak , K. Olejnik , M. Cukr , T. Jungwirth

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Abstract

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.

Keywords

ultrafast magnetization dynamics

Cite

@article{arxiv.0803.0320,
  title  = {Laser-induced Precession of Magnetization in GaMnAs},
  author = {E. Rozkotova and P. Nemec and D. Sprinzl and P. Horodyska and F. Trojanek and P. Maly and V. Novak and K. Olejnik and M. Cukr and T. Jungwirth},
  journal= {arXiv preprint arXiv:0803.0320},
  year   = {2009}
}

Comments

4 pages, 5 figures

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