Title :
Ultrafast demagnetization in CoPt/sub 3/ alloy films
Author :
Beaurepaire, E. ; Maret, M. ; Halte, V. ; Merle, J.-C. ; Daunois, A. ; Bigot, J.-Y.
Author_Institution :
Inst. de Phys. et Chimie des Mater., CNRS, Strasbourg, France
Abstract :
Summary form only given.A dynamical magnetic phase transition has been observed in CoPt/sub 3/ alloy films. This phase transition, which is consistent with the ferro-paramagnetic transition, occurs with a characteristic time of about 100 fs, i.e., comparable with the pulse duration (120 fs). This ultrafast demagnetization demonstrates the feasibility of ultrafast magnetooptic devices. This result could lead to even faster magnetic effects using shorter pulses and/or other materials.
Keywords :
cobalt compounds; demagnetisation; ferromagnetic materials; high-speed optical techniques; magneto-optical devices; optical films; paramagnetic materials; 100 fs; 120 fs; CoPt/sub 3/; CoPt/sub 3/ alloy films; characteristic time; dynamical magnetic phase transition; ferro-paramagnetic transition; pulse duration; ultrafast demagnetization; ultrafast magnetooptic devices; Delay; Demagnetization; Laser excitation; Magnetic field measurement; Magnetic films; Magnetization; Optical films; Perpendicular magnetic anisotropy; Probes; Ultrafast optics;
Conference_Titel :
Quantum Electronics Conference, 1998. IQEC 98. Technical Digest. Summaries of papers presented at the International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-541-2
DOI :
10.1109/IQEC.1998.680153
