Time resolved pump-probe scattering in MnAs/GaAs(001): A look into the dynamics of alpha-beta stripe domains

Maurizio Sacchi (1) , Carlo Spezzani (2) , Enrico Allaria , Eugenio Ferrari , Marcello Coreno , Massimiliano Marangolo (1) , Mahmoud Eddrief (1) , Victor H. Etgens (1) , Giovanni de Ninno

1 INSP - Institut des Nanosciences de Paris
2 Elettra Sincrotrone Trieste

Scattering of 130 nm radiation with 100 fs pulse length was used to monitor the alpha/beta-striped microstructure in MnAs/GaAs(001), after a 390 nm 5 mJcm(-2) pump pulse. A strong reduction of the Bragg peak intensity, corresponding to a widening of the beta-stripes, takes place with a characteristic time of 15 ps. These results are relevant within the context of using MnAs/GaAs(001) as a template for the growth of ferromagnetic films, whose magnetization direction can be controlled by modifying the template temperature. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4720398]

Domaines: Matière Condensée [cond-mat]

Maurizio Sacchi, Carlo Spezzani, Enrico Allaria, Eugenio Ferrari, Marcello Coreno, et al.. Time resolved pump-probe scattering in MnAs/GaAs(001): A look into the dynamics of alpha-beta stripe domains. Applied Physics Letters, 2012, 100 (21), pp.211905. ⟨10.1063/1.4720398⟩. ⟨hal-01240936⟩