All-optical four-state magnetization reversal in (Ga,Mn)As ferromagnetic semiconductors
| Title | All-optical four-state magnetization reversal in (Ga,Mn)As ferromagnetic semiconductors |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Kapetanakis MD, Lingos PC, Piermarocchi C, Wang J, Perakis IE |
| Journal Title | Applied Physics Letters |
| Volume | 99 |
| Pages | 091111 |
| Date Published | 08 |
| Type of Article | Article |
| ISBN Number | 0003-6951 |
| Accession Number | WOS:000294489300010 |
| Keywords | anisotropy, dynamics, spin, ultrafast |
| 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 similar to 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. (C) 2011 American Institute of Physics. [doi:10.1063/1.3634031] |
| DOI | 10.1063/1.3634031 |
| Alternate Journal | Appl. Phys. Lett. |
