Title :
Ultrafast demagnetization in ferromagnetic InMnAs
Author :
Wang, J. ; Sun, C. ; Kono, J. ; Owia, A. ; Munekata, H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX, USA
Abstract :
We have studied demagnetization processes in ferromagnetic InMnAs induced by femtosecond mid-infrared laser pulses. At high pump fluences, complete magnetization quenching was observed within a few picoseconds, implying an ultrafast ferro- to paramagnetic phase transition.
Keywords :
III-V semiconductors; demagnetisation; ferromagnetic materials; ferromagnetic-paramagnetic transitions; high-speed optical techniques; indium compounds; laser beam effects; manganese compounds; InMnAs; demagnetization process; femtosecond mid-infrared laser pulse; ferromagnetic InMnAs; magnetization quenching; paramagnetic phase transition; ultrafast demagnetization; ultrafast ferromagnetic phase transition; Delay effects; Demagnetization; Laser transitions; Magnetic field measurement; Magnetization; Optical pulses; Paramagnetic materials; Reflectivity; Temperature; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2005. QELS '05
Print_ISBN :
1-55752-796-2
DOI :
10.1109/QELS.2005.1548920
