Dynamics of Laser-Induced Magnetostructural Phase Transitions in MnAs/GaAs (001) Epitaxial Layers

作者：Lounis Lounes; Zheng Yunlin; Spezzani Carlo; Ferrari Eugenio; Edrrief Mahmoud; Ciavardini Alessandra; Popescu Horia; Allaria Enrico; Laulhe Claire; Vidal Franck; Sacchi Maurizio^*

来源：IEEE Transactions on Magnetics, 2017, 53(11): 8205004.

DOI：10.1109/TMAG.2017.2692209

• Magnetization switching
• pump-probe experiments
• structure dynamics
• X-ray scattering

We have investigated by time-resolved X-ray diffraction the manganese arsenide structure dynamics in MnAs/GaAs (001) epitaxial films, when the alpha -> beta magnetostructural phase transition is triggered by an ultra-fast optical laser pulse. Understanding the photo-induced phase transition dynamics is relevant for applications of MnAs/GaAs (001) as a magnetically active template in laser-induced magnetization switching processes. The main goal of our experiment is to determine the timescales of the structural changes that are likely to play a role in laser-driven magnetization reversal.

• 出版日期2017-11