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All-optical four-state magnetization reversal in (Ga,Mn)As ferromagnetic semiconductors.
- Source :
-
Applied Physics Letters . 8/29/2011, Vol. 99 Issue 9, p091111. 3p. 2 Graphs. - Publication Year :
- 2011
-
Abstract
- Using density matrix equations of motion and a tight-binding band calculation, we predict all-optical switching between four metastable magnetic states of (III,Mn)As ferromagnets. This switching is initiated non-thermally within 100 fs, during nonlinear coherent photoexcitation. For a single optical pulse, magnetization reversal is completed after ∼100 ps and controlled by the coherent femtosecond photoexcitation. Our predicted switching comes from magnetic nonlinearities triggered by a femtosecond magnetization tilt that is sensitive to un-adiabatic light-induced spin interactions. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MAGNETIZATION
*FERROMAGNETISM
*PARAMAGNETISM
*SEMICONDUCTORS
*PHOTOELECTRICITY
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 99
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 65143942
- Full Text :
- https://doi.org/10.1063/1.3634031