Title :
Ultrafast coercivity and magnetization dynamics in GaMnAs
Author :
Hall, K.C. ; Zahn, J.P. ; March, S. ; Liu, X. ; Furdyna, And J K
Author_Institution :
Dept. of Phys. & Atmos. Sci., Dalhousie Univ., Halifax, NS
Abstract :
Using time-resolved magneto-optical Kerr effect spectroscopy, the magnetization and coercivity dynamics in GaMnAs are investigated. A subpicosecond ferromagnetic to paramagnetic phase transition is observed, followed by coercivity enhancement on longer time scales.
Keywords :
Kerr magneto-optical effect; coercive force; ferromagnetic-paramagnetic transitions; gallium compounds; manganese compounds; semimagnetic semiconductors; time resolved spectroscopy; GaMnAs; ferromagnetic-paramagnetic phase transition; magnetization dynamics; magneto-optical Kerr effect; time-resolved spectroscopy; ultrafast coercivity; Coercive force; Delay; Magnetic fields; Magnetization; Nonlinear optics; Optical buffering; Optical pumping; Pulse amplifiers; Temperature; Ultrafast optics; (320.7130) Ultrafast processes in condensed matter, including semiconductors;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
