Picosecond dynamics of the photoinduced spin polarization in epitaxial (Ga,Mn)as films.
SourcePhysical Review Letters, 92, 23, (2004), pp. 237203
Article / Letter to editor
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Ultrafast Spectroscopy of Correlated Materials
Spectroscopy of Solids and Interfaces
Physical Review Letters
SubjectScanning Probe Microscopy; Spectroscopy of Solids and Interfaces
Static and time-resolved magneto-optical spectra of the ferromagnetic semiconductor (Ga,Mn)As show that a pulsed photoexcitation with a fluence of 10 microJ/cm(2) is equivalent to the application of an external magnetic field of about 1 mT, which relaxes with a decay time of 30 ps. This relaxation is attributed to the spin relaxation of electrons in the conduction band and is found to be not affected by interactions with Mn ions.
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